Hubbry Logo
AsteriskAsteriskMain
Open search
Asterisk
Community hub
Asterisk
logo
7 pages, 0 posts
0 subscribers
Be the first to start a discussion here.
Be the first to start a discussion here.
Contribute something
Asterisk
Asterisk
from Wikipedia
*
Asterisk
In UnicodeU+002A * ASTERISK (*, *)
Related
See alsoU+203B REFERENCE MARK (komejirushi)
U+A673 SLAVONIC ASTERISK

The asterisk (/ˈæstərɪsk/ *), from Late Latin asteriscus, from Ancient Greek ἀστερίσκος, asteriskos, "little star",[1][2] is a typographical symbol. It is so called because it resembles a conventional image of a heraldic star.

Computer scientists and mathematicians often vocalize it as star (as, for example, in the A* search algorithm or C*-algebra). An asterisk is usually five- or six-pointed in print and six- or eight-pointed when handwritten, though more complex forms exist. Its most common use is to call out a footnote. It is also often used to censor offensive words.

In computer science, the asterisk is commonly used as a wildcard character, or to denote pointers, repetition, or multiplication.

History

[edit]
The asteriskos used in an early Greek papyrus.
Early asterisks seen in the margin of Greek papyrus.
[3]

The asterisk was already in use as a symbol in ice age cave paintings.[4] There is also a two-thousand-year-old character used by Aristarchus of Samothrace called the asteriskos, , which he used when proofreading Homeric poetry to mark lines that were duplicated.[5] Origen is known to have also used the asteriskos to mark missing Hebrew lines from his Hexapla.[6] The asterisk evolved in shape over time, but its meaning as a symbol used to correct defects remained.

In the Middle Ages, the asterisk was used to emphasize a particular part of text, often linking those parts of the text to a marginal comment.[7] However, an asterisk was not always used.

One hypothesis to the origin of the asterisk is that it stems from the 5000-year-old Sumerian character dingir, 𒀭,[8] though this hypothesis seems to only be based on visual appearance.[9]

Usage

[edit]

Censorship

[edit]

When toning down expletives, asterisks are often used to replace letters. For example, the word "badword" might become "ba***rd", "b*****d", "b******" or even "*******".[10] Vowels tend to be censored with an asterisk more than consonants, but the intelligibility of censored profanities with multiple syllables such as "b*dw*rd" and "b*****d" or "ba****d", or uncommon ones is higher if put in context with surrounding text.[11]

When a document containing classified information is published, the document may be "sanitized" (redacted) by replacing the classified information with asterisks. For example, the Intelligence and Security Committee Russia report.

Competitive sports and games

[edit]

In colloquial usage, an asterisk attached to a sporting record indicates that it is somehow tainted. This is because results that have been considered dubious or set aside are recorded in the record books with an asterisk rendering to a footnote explaining the reason or reasons for concern.[12]

Baseball

[edit]

The usage of the term in sports arose during the 1961 baseball season in which Roger Maris of the New York Yankees was threatening to break Babe Ruth's 34-year-old single-season home run record. Ruth had amassed 60 home runs in a season with only 154 games, but Maris was playing the first season in the American League's newly expanded 162-game season. Baseball Commissioner Ford C. Frick, a friend of Ruth's during the legendary slugger's lifetime, held a press conference to announce his "ruling" that should Maris take longer than 154 games both records would be acknowledged by Major League Baseball, but that some "distinctive mark" [his term][13] be placed next to Maris', which should be listed alongside Ruth's achievement in the "record books". The asterisk as such a mark was suggested at that time by New York Daily News sportswriter Dick Young, not Frick.[13] The reality, however, was that MLB actually had no direct control over any record books until many years later, and it all was merely a suggestion on Frick's part. Within a few years the controversy died down and all prominent baseball record keepers listed Maris as the single-season record holder for as long as he held the record.[13]

Nevertheless, the stigma of holding a tainted record remained with Maris for many years, and the concept of a real or figurative asterisk denoting less-than-accepted "official" records has become widely used in sports and other competitive endeavors. A 2001 TV movie about Maris's record-breaking season was called 61* (pronounced sixty-one asterisk) in reference to the controversy.

Uproar over the integrity of baseball records and whether or not qualifications should be added to them arose again in the late 1990s, when a steroid-fueled power explosion led to the shattering of Maris' record. Even though it was obvious - and later admitted[14] - by Mark McGwire that he was heavily on steroids when he hit 70 home runs in 1998, ruling authorities did nothing - to the annoyance of many fans and sportswriters. Three years later self-confessed steroid-user Barry Bonds pushed that record out to 73, and fans once again began to call for an asterisk in the sport's record books.

Fans were especially critical and clamored louder for baseball to act during the 2007 season, as Bonds approached and later broke Hank Aaron's career home run record of 755.[15]

The Houston Astros' 2017 World Series win was marred after an investigation by MLB revealed the team's involvement in a sign-stealing scheme during that season. Fans, appalled by what they perceived to be overly lenient discipline against the Astros players, nicknamed the team the "Houston Asterisks".[16]

In recent years, the asterisk has come into use on baseball scorecards to denote a "great defensive play."[17]

Usage in anti-doping campaigns

[edit]
  • By the end of the first decade of the 21st century, the association of baseball and its records with doping had become so notorious that the term "asterisk" had become firmly associated with doping in sport. In February 2011 the United States Olympic Committee and the Ad Council launched an anti-steroid campaign called "Play Asterisk Free"[18] aimed at teens. The campaign, whose logo uses a heavy asterisk (✱), first launched in 2008 under the name "Don't Be An Asterisk".[19]

Cricket

[edit]
  • In cricket, it signifies a total number of runs scored by a batsman without losing their wicket; e.g. "107*" means "107 not out".
  • Where only the scores of the two batsmen that are currently in are being shown, an asterisk following a batsman's score indicates that he is due to face the next ball to be delivered.
  • When written before a player's name on a scorecard, it indicates the captain of the team.
  • It is also used on television when giving a career statistic during a match. For example, "47*" in a number of matches column means that the current game is the player's 47th.

Other sports

[edit]

During the first decades of the 21st century, the term asterisk to denote a tainted accomplishment[citation needed] caught on in other sports first in North America and then, due in part to North American sports' widespread media exposure, around the world.

Computing

[edit]
  • In regular expressions, the asterisk is used to denote zero or more repetitions of a pattern; this use is also known as the Kleene star or Kleene closure after Stephen Kleene.
  • In Unified Modeling Language, the asterisk is used to denote zero to many classes.
  • In some command line interfaces, such as the Unix shell and Microsoft's CMD, the asterisk is the wildcard character (or wildcard symbol) and stands for any string of characters. A common use of the wildcard is in searching for files on a computer. For instance, if a user wished to find a document called Document 1, search terms such as Doc* and D*ment* would return this file. Due to being a wildcard, they could also return files like Document 2 and (only the latter) Dark Knight Monument.jpg. Document* would in fact return any file that begins with Document, and D*ment* any file that began with D and had 'ment' somewhere in its name.
  • In some graphical user interfaces, an asterisk is pre- or affixed to the current working document name shown in a window's title bar to indicate that unsaved changes exist.
  • In many computing and Internet applications, an asterisk is displayed in place of the characters of sensitive or confidential visible information, such as a password.
  • In Commodore (and related) file systems, an asterisk appearing next to a filename in a directory listing denotes an improperly closed file, commonly called a "splat file".
  • In travel industry Global Distribution Systems, the asterisk is the display command to retrieve all or part of a Passenger Name Record.
  • In HTML web forms, a (usually red) asterisk can be used to denote required fields.
  • Chat room etiquette calls on one asterisk to correct a misspelled word or typo that has already been submitted. For example, one could post lck, then follow it with *luck or luck* (the placement of the * on the left or right is a matter of personal style) to correct the word's spelling, or if it's someone else that notices the mistake, they might also use *luck or luck*.[20] This also applies to typos that result in a different word from the intended one but are correctly spelled.
  • In comics, enclosing a word or phrase between two asterisks is used to denote an action the subject is "performing", e.g. *cough*.[21][better source needed]
  • In Markdown and other markup languages, surrounding a set of characters or words in one asterisk italicizes, two asterisks bolds, and three asterisks both italicizes and bolds.[22] See the table below for examples of all three uses of the asterisk in Markdown, including how it translates to HTML and how it renders.
Markdown Italicized text is the *cat's meow*. I just love **bold text**. This text is ***really important***.
HTML Italicized text is the <em>cat's meow</em>. I just love <strong>bold text</strong>. This text is <em><strong>really important</strong></em>.
Rendered Output Italicized text is the cat's meow. I just love bold text. This text is really important.

Adding machines and printing calculators

[edit]
  • Some models of adding machines and printing calculators use the asterisk to denote the total, or the terminal sum or difference of an addition or subtraction sequence, respectively. The symbol is sometimes given on the printout to indicate this total.[citation needed]

Programming languages

[edit]

Many programming languages and calculators use the asterisk as a symbol for multiplication. It also has a number of special meanings in specific languages, for instance:

  • In some languages such as C, C++, Rust and Go, the asterisk is used to dereference or declare a pointer variable.
  • In Common Lisp, the names of global variables are conventionally set off with asterisks, *LIKE-THIS*.
  • In Ada, Fortran, Perl, Python, Ruby, some dialects of Pascal, and many others, a double asterisk is used to signify exponentiation: 5**3 is 53 = 125.
  • In Perl, the asterisk is used to refer to the typeglob of all variables with a given name.
  • In Ruby and Python, the asterisk has two specific uses. First, the unary * operator applied to a list object inside a function call will expand that list into the positional arguments of the function call. Second, a parameter preceded by * in the parameter list in a function definition will result in any extra positional parameters being aggregated into a tuple (Python) or array (Ruby), and likewise a parameter preceded by ** will result in any extra keyword parameters being aggregated into a dictionary (Python) or hash (Ruby):
from typing import Any

def function1(a: int, b: int, c: int, d: int) -> None:
    print(a, b, c, d)
    
def function2(first: int, *args: tuple[int, ...]) -> None:
    # args will be a tuple
    # the name 'args' is convention: it may be any parameter name
    print(args)
    
def function3(first: int, **kwargs: dict[str, Any]) -> None:
    # kwargs will be a dict
    # the name 'kwargs' is convention: it may be any parameter name
    print(kwargs)

function1(1, 2, 3, 4) # prints 1 2 3 4
function1(*[1, 2, 3, 4]) # prints 1 2 3 4
function1(**{"a": 5, "b": 6, "c": 7, "d": 8}) # prints 5 6 7 8

function2(1, 2, 3, 4) # prints (2, 3, 4), 1 is not part of args
function2(99) # prints (), unfilled *parameter will be ()

function3(0, e = 3, f = 9) # prints {'e': 3, 'f': 9}, 0 is not part of kwargs
function3(0) # prints {}, unfilled **parameter will be {}
  • In APL, the asterisk represents the exponential and exponentiation functions, with *X representing eX, and Y*X representing YX.
  • In IBM Job Control Language, the asterisk has various functions, including in-stream data in the DD statement, the default print stream as SYSOUT=*, and as a self-reference in place of a procedure step name to refer to the same procedure step where it appears.
  • In Haskell, the asterisk represents the set of well-formed, fully applied types; that is, a 0-ary kind of types.
Comments in programming languages
[edit]

In the B programming language and languages that borrow syntax from it, such as C, PHP, Java, or C#, comments in the source code (for information to people, ignored by the compiler) are marked by an asterisk combined with the slash:

 /* This section displays message if user input was not valid
    (comment ignored by compiler) */

CSS also uses this comment format:

body {
  /* This ought to make the text more readable for far-sighted people */
  font-size: 24pt;
}

Some Pascal-like programming languages, such as Object Pascal, Modula-2, Modula-3, and Oberon, and other languages such as ML, Wolfram Language (Mathematica), AppleScript, OCaml, Standard ML, and Maple, use an asterisk combined with a parenthesis:

 (* Do not change this variable - it is used later
    (comment ignored by compiler) *)

Each computing language has its own way of handling comments; /* ... */ and similar notations are not universal.

History of information technology

[edit]

The asterisk was a supported symbol on the IBM 026 Keypunch (introduced in 1949 and used to create punch cards with data for early computer systems).[23] It was also included in the FIELDATA character encoding[24] and the ASCII standard.[25][26][27]

Economics

[edit]
  • In economics, the use of an asterisk superscript indicates that the variable such as price, output, or employment is at its optimal level (that which is achieved in a perfect market situation). For instance, is the price level when output is at its corresponding optimal level of .
  • Also in international economics asterisks are commonly used to denote economic variables in a foreign country. So, for example, is the price of the home good and is the price of the foreign good, etc.

Education

[edit]

Fluid mechanics

[edit]

In fluid mechanics an asterisk in superscript is sometimes used to mean a property at sonic speed.[28]

Games

[edit]
  • Certain categories of character types in role-playing games are called splats, and the game supplements describing them are called splatbooks. This usage originated with the shorthand "*book" for this type of supplement to various World of Darkness games, such as Clanbook: Ventrue (for Vampire: The Masquerade) or Tribebook: Black Furies (for Werewolf: The Apocalypse), and this usage has spread to other games with similar character-type supplements. For example, Dungeons & Dragons Third Edition has had several lines of splatbooks: the "X & Y" series including Sword & Fist and Tome & Blood prior to the "3.5" revision, the "Complete X" series including Complete Warrior and Complete Divine, and the "Races of X" series including Races of Stone and Races of the Wild.
  • In Magic: The Gathering, an asterisk is used on a creature's power and/or toughness when it's a variable amount.
  • In many MUDs and MOOs, as well as "male", "female", and other more esoteric genders, there is a gender called "splat", which uses an asterisk to replace the letters that differ in standard English gender pronouns. For example, h* is used rather than him or her. Also, asterisks are used to signify doing an action, for example, "*action*".
  • Game show producer Mark Goodson used a six-pointed asterisk as his trademark. It is featured prominently on many set pieces from The Price Is Right.
  • Scrabble players put an asterisk after a word to indicate that an illegal play was made.[29]

Human genetics

[edit]
  • In human genetics, * is used to denote that someone is a member of a haplogroup and not any of its subclades (see * (haplogroup)).

Linguistics

[edit]

In linguistics, an asterisk may be used for a range of purposes depending on what is being discussed. The symbol is used to indicate reconstructed words of proto-languages (for which there are no records). For modern languages, it may be placed before posited problematic word forms, phrases or sentences to flag that they are hypothetical, ungrammatical, unpronounceable, etc.

Historical linguist August Schleicher is cited as first using the asterisk for linguistic purposes, specifically for unattested forms that are linguistic reconstructions.[30]: 208 

Using the asterisk for descriptive and not just historical purposes arose in the 20th century.[31]: 334  By analogy with its use in historical linguistics, the asterisk was variously prepended to "hypothetical" or "unattested" elements in modern language.[31]: 332  Its usage also expanded to include "non-existent" or "impossible" forms. Leonard Bloomfield (1933) uses the asterisk with forms such as *cran, impossible to occur in isolation: cran- only occurs within the compound cranberry.[32]: 160 [31]: 331  Such usage for a "non-existent form" was also found in French, German and Italian works in the middle of the 20th century.[31]: 332–34 

Asterisk usage in linguistics later came to include not just impossible forms, but "ungrammatical sentences", those that are "ill formed for the native speaker".[31]: 332  The expansion of asterisk usage to entire sentences is often credited to Noam Chomsky, but Chomsky in 1968 already describes this usage as "conventional".[31]: 330  Linguist Fred Householder claims some credit,[33]: 365 [31]: 331  but Giorgio Graffi argues that using an asterisk for this purpose predates his works.[31]: 336 [a]

The meaning of the asterisk usage in specific linguistic works may go unelucidated so can be unclear.[33]: 369 [b] Linguistics sometimes uses double asterisks (**), another symbol such as the question mark, or both symbols (e.g. ?*) to indicate degrees of unacceptability.[33]: 369 

Historical linguistics

[edit]

In historical linguistics, the asterisk marks words or phrases that are not directly recorded in texts or other media, and that are therefore reconstructed on the basis of other linguistic material by the comparative method.[34]

In the following example, the Proto-Germanic word *ainlif is a reconstructed form.

A double asterisk (**) sometimes indicates an intermediary or proximate reconstructed form (e.g. a single asterisk for reconstructed thirteenth century Chinese and a double asterisk for reconstructions of older Ancient Chinese[35]: 5  or a double asterisk for proto-Popolocan and a single asterisk for intermediary forms[36]: 322 ).

In other cases, the double asterisk denotes a form that would be expected according to a rule, but is not actually found. That is, it indicates a reconstructed form that is not found or used, and in place of which another form is found in actual usage:

  • For the plural, **kubar would be expected, but separate masculine plural akābirأكابر‎ and feminine plural kubrayātكبريات‎ are found as irregular forms.

Ungrammaticality

[edit]

In most areas of linguistics, but especially in syntax, an asterisk in front of a word or phrase indicates that the word or phrase is not used because it is ungrammatical.[31]: 332 

  • wake her up / *wake up her

An asterisk before a parenthesis indicates that the lack of the word or phrase inside is ungrammatical, while an asterisk after the opening bracket of the parenthesis indicates that the existence of the word or phrase inside is ungrammatical—e.g., the following indicates "go the station" would be ungrammatical:

  • go *(to) the station

Use of an asterisk to denote forms or sentences that are ungrammatical is often complemented by the use of the question mark (?) to indicate a word, phrase or sentence that is avoided, questionable or strange, but not necessarily outright ungrammatical.[c]

Other sources go further and use several symbols (e.g. the asterisk, question mark, and degree symbol °) to indicate gradations or a continuum of acceptability.[d]

Ambiguity
[edit]

Since a word marked with an asterisk could mean either "unattested" or "impossible", it is important in some contexts to distinguish these meanings. In general, authors retain asterisks for "unattested", and prefix x, **, , or ? for the latter meaning.[e] An alternative is to append the asterisk (or another symbol, possibly to differentiate between even more cases) at the end.[citation needed]

Optimality theory

[edit]

In optimality theory, asterisks are used as "violation marks" in tableau cells to denote a violation of a constraint by an output form.[42]

Phonetic transcription

[edit]

In phonetic transcription using the International Phonetic Alphabet and similar systems, an asterisk was historically used to denote that the word it preceded was a proper noun.[43][44] See this example from W. Perrett's 1921 transcription of Gottfried Keller's Das Fähnlein der sieben Aufrechten:[45]

ˈkɑinə ˈreːdə, virt ˈniçts daˈraˑus! zɑːktə *ˈheːdigər ˈkurts.
(»Keine Rede, wird nichts daraus!« sagte Hediger kurz.)

This convention is no longer usual.[46]

Mathematics

[edit]

The asterisk has many uses in mathematics. The following list highlights some common uses and is not exhaustive.

stand-alone
  • An arbitrary point in some set. Seen, for example, when computing Riemann sums or when contracting a simply connected group to the singleton set .
as a unary operator, denoted in prefix notation
  • The Hodge star operator on vector spaces .
as a unary operator, written as a subscript
as a unary operator, written as a superscript
as a binary operator, in infix notation
  • A notation for an arbitrary binary operator.
  • The free product of two groups.
  • is a convolution of with .
  • A notation for the horizontal composition of two natural transformations.
  • A notation to denote a parallel sum of two operands (most authors, however, instead use a or sign for this purpose).

The asterisk is used in all branches of mathematics to designate a correspondence between two quantities denoted by the same letter – one with the asterisk and one without.

Mathematical typography

[edit]

In fine mathematical typography, the Unicode character U+2217 ASTERISK OPERATOR (in HTML, &lowast;; not to be confused with U+204E LOW ASTERISK) is available. This character also appeared in the position of the regular asterisk in the PostScript symbol character set in the Symbol font included with Windows and Macintosh operating systems and with many printers.[citation needed] It should be used for a large asterisk that lines up with the other mathematical operators, sitting on the math centerline rather than on the text baseline.[48]

Music

[edit]

Religious texts

[edit]
  • In the Geneva Bible and the King James Bible, an asterisk is used to indicate a marginal comment or scripture reference.
  • In the Leeser Bible, an asterisk is used to mark off the seven subdivisions of the weekly Torah portion. It is also used to mark the few verses to be repeated by the reader of the Haftara.
  • In American printings of the Book of Common Prayer, an asterisk is used to divide a verse of a Psalm in two portions for responsive reading. British printings use a spaced colon (" : ") for the same purpose.[49]
  • In pointed psalms, an asterisk is used to denote a break or breath.

Star of Life

[edit]
The Star of Life may represent emergency medical services

A Star of Life, a six-bar asterisk overlaid with the Rod of Asclepius (the symbol of health), may be used as an alternative to cross or crescent symbols on ambulances.

Statistical results

[edit]

In many scientific publications, the asterisk is employed as a shorthand to denote the statistical significance of results when testing hypotheses. When the likelihood that a result occurred by chance alone is below a certain level, one or more asterisks are displayed. Popular significance levels are <0.05 (*), <0.01 (**), and <0.001 (***).

Telephony

[edit]

On a tone dialling telephone keypad, the asterisk (called star) is one of the two special keys (the other is the 'square key – almost invariably replaced by the number sign # (called 'pound sign' (US), 'hash' (other countries), or 'hex'), and is found to the left of the zero[50]). They are used to navigate menus in systems such as voice mail, or in vertical service codes. Its codepoint in Unicode is U+2217 ASTERISK OPERATOR (&lowast;) as a valid alternative usage.[51]

Typography

[edit]
  • The asterisk is used to call out a footnote, especially when there is only one on the page. Less commonly, multiple asterisks are used to denote different footnotes on a page (i.e., *, **, ***).[52][53] Typically, an asterisk is positioned after a word or phrase and preceding its accompanying footnote. Other characters are also used for this purpose, such as dagger (†, ‡) or superscript letters and numbers (as in Wikipedia). In marketing and advertising, asterisks or other symbols are used to refer readers discreetly to terms or conditions for a certain statement, the "small print".
  • In English-language typography the asterisk is placed after all other punctuation marks (for example, commas, colons, or periods) except for the dash.[54][55]
Asterisks used to illustrate a section break in Alice's Adventures in Wonderland
  • Three spaced asterisks centered on a page is called a dinkus and may represent a jump to a different scene, thought, or section.
  • A group of three asterisks arranged in a triangular formation is called an asterism. It may be used instead of a name on a title page.[53]
  • One or more asterisks may be used as censorship over all or part of a word.
  • Asterisks are sometimes used as an alternative to typographical bullets to indicate items of a list.
  • Asterisks can be used in textual media to represent *emphasis* when bold or italic text is not available (e.g., Twitter, text messaging).
  • Asterisks may denote conversational repair, or corrections to misspelling or misstatements in previous electronic messages, particularly when replacement or retraction of a previous writing is not possible, such as with "immediate delivery" messages or "instant messages" that can not be edited. Usually this takes the form of a message consisting solely of the corrected text, with an asterisk placed before (or after) the correction. For example, one might send a message reading "*morning" or "morning*" to correct the misspelling in the message "I had a good mroning".[20][citation needed]
  • Bounding asterisks as "a kind of self-describing stage direction", as linguist Ben Zimmer has put it. For example, in "Another gas station robbery *sigh*", the writer uses *sigh* to express disappointment (but does not necessarily literally sigh).[56]
  • Bounding asterisks can also represent an action in online situations where they aren't shown.[57]

Unique uses in other languages

[edit]
This sign, reading Radfahrer absteigen (Cyclists, dismount), has been amended with a gender star to make it gender-neutral.

The gender star (German: Genderstern, or diminutive Gendersternchen; lit.'gender asterisk') is a nonstandard typographic style used by some authors in gender-neutral language in German.[58]

It is formed by placing an asterisk after the stem and appending the feminine plural suffix "-innen". For example, Fahrer ([male] driver, singular & plural) becomes Fahrer*innen (drivers). The gender star makes it possible to refer to all genders while also including non-binary people.[59]

In speech, the gender star is sometimes signalled by a glottal stop.[60][61]

Alternatives to the gender star include Binnen-I (with medial capital I), the gender gap (where an underscore takes the place of the asterisk) or using inherently gender neutral terms, such as 'people' instead of 'man' or 'woman'.[62]

The gender star was named the German Anglicism of the Year in 2018 by the Leibniz-Institut für Deutsche Sprache.[63]

Encodings

[edit]

The Unicode standard has a variety of asterisk-like characters, compared in the table below. (Characters will display differently in different browsers and fonts.) The reason there are so many is chiefly because of the controversial[citation needed] decision to include in Unicode the entire Zapf Dingbats symbol font.

Asterisk Asterisk operator Heavy asterisk Small asterisk Full-width asterisk Open-centre asterisk
*
Low asterisk Arabic star East Asian reference mark Teardrop-spoked asterisk Sixteen-pointed asterisk
٭

In Unicode

[edit]

See also

[edit]

Notes

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The asterisk (*), derived from the term asteriskos meaning "little star," is a typographical symbol employed in writing and printing primarily as a for , to indicate omissions of letters or words, and to denote hypothetical or unattested linguistic forms. Its star-like appearance has facilitated its adoption across diverse fields, including for and dual objects, for wildcards and dereferencing, and for highlighting discrepancies. Originating around 200 BCE with the scholar at the , the asterisk served as a critical mark in editing Homer's works to flag passages borrowed from other sources or requiring attention, evolving from earlier Sumerian influences and alongside symbols like the . By the medieval period, it marked textual interpolations in biblical manuscripts, and during the , it gained prominence in scientific texts for footnotes and astronomical notations, gradually standardizing into its modern eight-pointed form through printing innovations. In contemporary usage, the asterisk functions ubiquitously in digital contexts as a multiplier in programming languages—adopted in by the mid-1950s—and as a censoring device for , while in , a prefixed asterisk denotes reconstructed proto-forms not directly attested in historical records. Its versatility underscores a defining characteristic: a simple bridging ancient scholarly precision with modern computational utility, though overuse in informal texting for emphasis or actions has diluted some traditional applications.

History

Origins and Etymology

The word asterisk derives from Late Latin asteriscus, borrowed from Ancient Greek asteriskos (ἀστερίσκος), the diminutive form of astēr (ἀστήρ) meaning "star," thus signifying "little star," in reference to the symbol's star-like appearance. This etymology reflects the symbol's visual resemblance to a small star, a characterization noted in scholarly texts since antiquity. The asterisk symbol's earliest documented use appears in ancient Greek textual scholarship, particularly by Aristarchus of Samothrace (c. 220–143 BC), the head librarian at Alexandria, who employed it as part of an editorial apparatus to denote passages in Homeric texts suspected of interpolation or requiring comparison with parallel versions. Aristarchus's system included the asterisk alongside other marks like obeloi for deletions, establishing a precursor to modern critical editing practices. By the 3rd century AD, the Church Father of incorporated the asterisk into his monumental (c. 240 AD), a six-column comparative edition of the , where it signaled words or phrases present in the Greek but absent from the Hebrew text, indicating potential additions. This application extended the symbol's role in , influencing subsequent scribal traditions in early Christian manuscripts. Claims of even earlier origins, such as in Sumerian pictographs dating back 5,000 years, lack direct verification and are considered speculative by historians of .

Early Manuscript and Scribal Uses

The asterisk, known in ancient Greek as asteriskos ("little star"), originated as a critical symbol in Hellenistic textual editing. Aristarchus of Samothrace (c. 220–143 BC), chief librarian of the Library of Alexandria, introduced it in his scholarly editions of Homer's Iliad and Odyssey to mark passages suspected of interpolation from other sources or lines repeated elsewhere in the text, signaling the need for reader caution without excision. This usage complemented other Aristarchian signs, such as the obelos (÷) for spurious content and the diple (>) for textual agreements, forming an early system of philological annotation. Subsequent scholars adopted these markers; (c. 185–253 AD) incorporated the asteriskos in his , a massive comparative edition of the , to indicate words or phrases in the absent from the Hebrew but present in Aquila's or Symmachus's Greek versions, or vice versa, aiding in the detection of translational discrepancies. Such applications underscored the asterisk's role in preserving textual integrity amid copying errors and variant traditions, with surviving papyri and scholia confirming its deployment in second-century BC manuscripts. In medieval scribal practice, the asterisk persisted for similar scholarly purposes, particularly in biblical manuscripts where it flagged passages drawn from non-canonical or alternative sources to denote potential interpolations. Scribes employed it alongside marginal notations for corrections, cross-references, or doubtful readings, as evidenced in Carolingian-era codices and later monastic copies, though its use remained sporadic compared to more common punctuation like points or spaces. This continuity reflects the asterisk's evolution from a precise tool to a versatile scribal aid in an era of manual transcription prone to .

Adoption in Printing and Early Modern Typography

The asterisk, long established in medieval scribal practices for marking cross-references and textual variants, was incorporated into early printed books shortly after the invention of around 1450. Printers, often trained as scribes, retained familiar symbols like the asterisk due to its utility in guiding readers to marginal annotations or supplementary notes, a continuity evident in the production of incunabula—European books printed before 1501. Its straightforward, star-like form proved advantageous for casting in durable metal type, allowing consistent reproduction across editions without the variability of handwritten variants such as dotted crosses. In biblical and classical texts, early printers employed the asterisk as a signe de renvoi to flag interpolations, parallel passages, or editorial clarifications, mirroring its manuscript role in distinguishing authentic content from additions. For example, printed Bibles and patristic works from the 1460s onward used asterisks to link body text to side notes, facilitating scholarly navigation in an era when full footnotes were rare and space constraints favored compact symbols over numerals. This adoption accelerated the symbol's standardization, as printers in , , and —key centers of 15th-century production—integrated it into type families alongside punctuation like the period and . By the early , amid the expansion of humanist scholarship and vernacular printing, the asterisk evolved into a primary footnote marker, especially for single or initial references on a page. Typographers sequenced it with the (†) and double dagger (‡) for subsequent notes, a convention that addressed the limitations of superscript numerals, which required finer type and were prone to misalignment in early presses. This system supported the era's proliferation of annotated editions, legal texts, and scientific treatises, where precise referencing enhanced credibility amid debates over textual authenticity. Printers like in exemplified this by using asterisks in polyglot Bibles and editions around 1500, promoting legibility and intellectual rigor in response to growing print volumes exceeding 20,000 incunabula titles by 1501.

Symbol Properties and Encodings

Graphical Forms and Evolution

The asterisk symbol traces its graphical origins to scholarship, where (c. 216–143 BC) introduced it as a marginal mark in editions of to indicate lines present in other manuscripts but deemed spurious or noteworthy by him. This early form, reflecting its etymological root in asteriskos ("little star"), likely consisted of a simple star-like or cross-shaped notation, akin to four radiating lines or points intersecting at a center, used alongside other critical signs like the . In medieval European manuscripts, the asterisk evolved into more elaborate handwritten variants, often rendered as a six- or eight-pointed to draw to textual annotations, omissions, or cross-references, particularly in biblical codices where it flagged passages drawn from variant sources or Hebrew originals. Its appearance varied by scribe and region, sometimes incorporating dots or flourishes for emphasis, but it retained a stellar motif to signify significance or return points in the text; however, usage declined in frequency after the as other notae like manicules gained prominence. The transition to print in the standardized the asterisk's form for metal , favoring a compact five- or six-pointed star that balanced legibility and production efficiency, as seen in incunabula where it served as a footnote or index marker. By the , typographic refinements in works by printers like solidified its modern silhouette—typically symmetrical rays extending from a central void—while accommodating decorative flourishes in scholarly editions; this shift from fluid strokes to rigid glyphs enhanced reproducibility but reduced variability. Contemporary graphical forms maintain the asterisk's core stellar identity, with printed versions usually five- or six-pointed and handwritten ones often six- to eight-pointed, though font-specific designs introduce subtle variations: typefaces may curve the points for elegance, sans-serifs simplify to straight lines, and decorative styles multiply rays up to sixteen. Digital standards, such as Unicode U+002A, ensure consistent baseline alignment and scalability, yet preserve typographic flexibility across media.

Digital Encodings and Standards

The asterisk (*) is encoded as the value 42 ( 2A) in the American Standard Code for Information Interchange (ASCII), a 7-bit standard developed in the for digital telecommunication and data processing equipment. This encoding positions the asterisk among the printable ASCII characters (codes 32–126), specifically as a symbol following the plus sign and preceding the comma. ASCII's adoption as a foundational standard for early ensured the asterisk's portability across systems, from teletypewriters to mainframes, without alteration in its byte representation. In Unicode, the asterisk is assigned the code point U+002A within the Basic Latin block (U+0000–U+007F), which directly mirrors the ASCII repertoire to maintain compatibility. Introduced in Unicode version 1.1 (June 1993), it is categorized as "Punctuation, Other," exhibits neutral bidirectional behavior (Other Neutrals), and is not mirrored in right-to-left scripts. Its UTF-8 encoding is the single byte 0x2A, UTF-16 is 0x002A, and UTF-32 is 0x0000002A, enabling efficient representation in modern text processing. HTML entities include * (decimal) or * (hexadecimal), with * as a named equivalent for semantic markup. Extended 8-bit encodings such as ISO/IEC 8859-1 (Latin-1), part of the ISO/IEC 8859 family standardized in 1987, retain the asterisk at byte 0x2A in the ASCII-compatible range (0x00–0x7F), supporting Western European languages while preserving basic symbols. Similar consistency appears in other ISO 8859 variants (e.g., ISO 8859-2 for Latin-2), where the asterisk occupies the same position to ensure interoperability with ASCII-derived systems. These standards, alongside Unicode's superset approach, have standardized the asterisk's digital form, minimizing rendering variances across fonts and platforms, though design may vary (e.g., four- to six-pointed stars).

Core Typographic and Editorial Uses

Footnotes, References, and Cross-References

The asterisk functions primarily as the initial superscript marker for footnotes in typographic conventions, initiating a traditional sequence of symbols—asterisk (*), (†), double dagger (‡), (§), and (¶)—before numerical superscripts are employed for additional notes. This symbolic hierarchy, rooted in early practices, minimizes visual clutter and distinguishes annotations from inline numbering in dense texts such as legal documents, academic works, and periodicals. In style guides like those referenced by the , the asterisk mandates a matching footnote at the page bottom, ensuring direct linkage without ambiguity. Placement rules position the superscript asterisk immediately after the relevant word or —commas, periods, or colons—but before em dashes, with no intervening to maintain textual flow. Corresponding footnotes begin with a full-sized asterisk followed by content, often separated by a horizontal rule or indentation for clarity. This format persists in digital typesetting software, where custom markers can replicate the symbol for non-numerical sequences. Beyond standard footnotes, asterisks facilitate cross-references by signaling supplementary material, such as editorial clarifications or navigational cues in manuscripts and early printed Bibles, where they denoted marginal scriptural links. In contemporary , they mark references to external or internal content, including omitted details or withheld titles, promoting precise reader redirection without disrupting primary narrative flow. International bodies like the employ asterisks alongside numbers and letters as footnote indicators for official documents, underscoring their versatility in formal referential systems.

Censorship, Obscenity Masking, and Self-Censorship Practices

The asterisk serves as a typographical device for partially obscuring obscene or profane words in print and , typically by replacing internal letters—often vowels—with one or more asterisks, as in "f**k" or "sh*t." This masking conveys the word's to informed readers while nominally complying with editorial standards or legal constraints on explicit . The practice traces to at least the in English literature, where asterisks, alongside dashes and ellipses, signaled suppressed letters in profane oaths or blasphemous expressions to evade common-law prohibitions on obscene libel. Religious oaths faced stricter than secular , with publishers substituting symbols to avoid charges of corrupting public morals under evolving statutes like the UK's Obscene Publications Act of 1857. By the , such representations as "d--n" or initial letters followed by asterisks appeared routinely in novels and periodicals, enabling authentic depiction of coarse speech without full exposure. , in a preface to one of his works, derided this as a "degree of execution" akin to refilling an empty bottle, highlighting its prevalence yet ineffectiveness in truly concealing intent. In the 20th and 21st centuries, asterisk masking shifted toward by authors and editors wary of audience offense, advertiser boycotts, or platform algorithms. Victorian-era bowdlerizations persisted into modern reprints, but contemporary often employs partial asterisks to balance realism with marketability, as full risks alienating conservative readers or violating content guidelines. exhibits similar practices; for instance, some outlets mask expletives in quotes to soften impact, though this has drawn for undermining the quoted material's force and treating audiences paternalistically. The Guardian's explicitly advises against asterisks, mandating full spelling when is germane to reporting, as partial distorts evidence central to events like legal cases involving coarse . Digitally, asterisks facilitate evasion of automated filters on , search engines, and publishing platforms, where full words trigger demotion or removal—yet the substitution preserves semantic clarity, rendering the "" largely performative. This persists despite trends toward linguistic candor in literature, where unmasked enhances authenticity, as evidenced by declining use in post-2000 amid relaxed norms. Empirical critiques note that masking fails to obscure meaning—readers routinely reconstruct terms like "f*ck" from context—thus serving more as a social signal of restraint than genuine suppression, often driven by institutional pressures rather than reader demand.

Corrections, Emphasis, and Informal Annotations

In ancient , the asterisk served as a critical mark to denote additions, corrections, or passages interpolated from other sources. , head of the in the 2nd century BCE, employed the asteriskos to flag lines in Homeric texts borrowed from alternate versions, distinguishing them from the primary . Similarly, of , in the 3rd century CE, used asterisks in his to indicate verses added to the translation from Hebrew originals not present in earlier Greek versions, aiding scholars in reconstructing textual variants. During the medieval period, scribes continued this tradition in biblical manuscripts, applying asterisks to highlight supplemental or corrective material sourced externally, such as harmonizations from parallel scriptural accounts. In and editorial practices, the asterisk functioned as a marginal symbol to direct attention to errors or required insertions, often paired with specific instructions like "insert" or "delete," as standardized in typographic conventions from the printing era onward. For emphasis, asterisks enclose words or phrases in plain-text environments to simulate italics or bolding, a convention predating rich formatting in digital writing; for instance, renders as italicized in parsers. This usage underscores key ideas without semantic alteration, though overuse can dilute impact, as noted in typographic guidelines favoring restraint to maintain readability. Informal annotations leverage the asterisk for self-corrections in real-time digital communication, such as placing corrected word after a misspelling to clarify intent without formal revision, a practice emerging in late-1980s bulletin board systems and proliferating in chat rooms. Enclosing actions or asides, like pauses for effect, mimics stage directions, enhancing expressiveness in unformatted text while signaling non-literal content. These applications prioritize utility over formality, often bypassing traditional editorial rigor.

Computing and Information Technology Applications

Wildcards, Pattern Matching, and File Operations

In operating systems, the asterisk (*) serves as the primary for filename globbing, enabling during file operations in shell commands. The shell expands patterns containing * before passing arguments to programs; for instance, ls *.txt matches and lists all files ending in ".txt", where * substitutes for zero or more characters excluding slashes. This expansion, known as globbing, originated in early Unix implementations around 1971, initially handled by a separate utility like /etc/glob that programs invoked to resolve wildcards. By in 1979, the integrated globbing directly, replacing external calls and standardizing * for any sequence in filenames. Globbing patterns treat * as matching non-directory-separator characters within a single path component, distinguishing them from full regular expressions where * acts as a quantifier () for zero or more repetitions following another element. In file operations, this supports efficient manipulation of groups, such as cp *.log /backup/ to copy all log files or grep error *.c to search source files for errors. If no files match an unquoted , most shells pass the literal to the command, potentially causing errors, though options like Bash's nullglob can suppress expansion. Extensions in modern shells enhance * for complex matching: Bash's globstar option (enabled via shopt -s globstar) interprets ** as recursive, matching files across subdirectories, e.g., find **/*.o for all object files. Similar functionality appears in programming libraries like Python's glob module or C's fnmatch, which emulate shell patterns for programmatic file selection. These uses prioritize simplicity for interactive and scripted file handling over the precision of regex, though mismatches can arise when glob * encounters special characters like dots unless quoted.

Programming Syntax, Pointers, and Arguments

In C and C++, the asterisk denotes pointer types in declarations and serves as the dereference operator. A pointer is declared by placing an asterisk between the base type and the variable name, such as int *ptr;, where ptr holds the memory address of an integer. The asterisk's placement associates it with the variable rather than the type alone, as evidenced by the need for repetition in multiple declarations like int *ptr1, *ptr2; to ensure both are pointers, whereas int* ptr1, ptr2; makes only ptr1 a pointer. Dereferencing with *ptr retrieves or assigns the value at that address, enabling direct memory manipulation. Pointers are commonly used in function arguments to simulate pass-by-reference, avoiding value copying for large data structures. A parameter like void modify(int *value) receives an address, allowing internal dereferencing such as *value += 1; to alter the original argument. Multiple asterisks indicate higher-order pointers, e.g., char **argv for an array of string pointers, as in command-line argument processing. This syntax originated in C for efficiency in systems programming, where direct address handling is essential, and persists in C++ alongside references (denoted by &). In Python, a leading asterisk in function parameters captures variable positional arguments into a . The syntax def func(*args): packs excess arguments passed positionally into args, supporting flexible as in def [average](/page/Average)(*numbers): return sum(numbers) / len(numbers). This enables calls with varying counts, like average(1, 2, 3), where numbers becomes (1, 2, 3). A bare asterisk, as in def func(a, *, b=0):, enforces subsequent parameters as keyword-only, preventing positional misuse and enhancing readability. Conversely, prefixing an iterable with * unpacks it during function calls, e.g., func(*[1, 2, 3]) expands to separate arguments. In C variadic functions like printf(const char *format, ...);, the handles extra arguments, processed via va_list (a pointer-like type), but the asterisk appears in the fixed format parameter rather than the variable syntax itself.

c

#include <stdarg.h> void print_ints(int count, ...) { va_list args; va_start(args, count); for (int i = 0; i < count; i++) { int val = va_arg(args, int); // Output val } va_end(args); }

#include <stdarg.h> void print_ints(int count, ...) { va_list args; va_start(args, count); for (int i = 0; i < count; i++) { int val = va_arg(args, int); // Output val } va_end(args); }

This mechanism relies on underlying pointer arithmetic, though not explicitly via asterisk in the argument list.

Command-Line Interfaces and User Interfaces

In command-line interfaces of Unix-like operating systems, the asterisk (*) serves as the primary wildcard character for globbing, or filename expansion, matching zero or more arbitrary characters in patterns supplied to commands. For example, the ls *.txt command expands to list all files with the .txt extension in the current directory, while rm *~ removes all backup files ending in ~. This mechanism, defined in POSIX shell standards, originated in early Unix versions through a separate glob utility introduced in Unix Version 1 in 1971, before being integrated directly into shells like the Bourne shell released in 1977.

bash

ls *.txt # Expands to list all .txt files

ls *.txt # Expands to list all .txt files

Shells such as Bash and Zsh perform this expansion before passing arguments to the invoked program, with unmatched patterns either left literal or handled via options like shopt -s nullglob in Bash to avoid errors. Globbing enhances efficiency for bulk file operations but requires escaping the asterisk (e.g., \*) to treat it literally, as unescaped instances trigger expansion. In graphical user interfaces (GUIs), asterisks frequently mask sensitive inputs, such as in password fields where each character typed is visually replaced by * to prevent disclosure via shoulder surfing. This practice emerged with early GUI systems, including MS-DOS login interfaces in the 1980s, and remains standard in web forms and applications using HTML <input type="password"> elements. Empirical analysis indicates, however, that full masking can reduce typing accuracy and discourage complex passwords, offering limited protection against determined observers while complicating self-verification during entry. Another prevalent GUI convention places an asterisk next to form labels to denote required fields, signaling mandatory input to users and reducing submission errors. This notation traces to 1970s mainframe data entry systems and aligns with usability guidelines emphasizing clear affordances over vague legends. For instance, in web design, CSS can automate asterisk rendering via :required pseudo-classes on form elements. Compliance aids accessibility, though over-reliance without semantic HTML attributes like aria-required="true" may confuse screen reader users.

Linguistic and Philological Applications

Marking Hypothetical or Ungrammatical Forms

In historical linguistics and philology, the asterisk precedes reconstructed forms of words or morphemes that are unattested in surviving texts but hypothesized through comparative methods, such as the analysis of cognates across related languages. For instance, the Proto-Indo-European root for "father" is denoted as *ph₂tḗr, derived from systematic sound correspondences in daughter languages like Latin pater and Sanskrit pitṛ, but never directly recorded. This convention, established by the 19th century in works on Indo-European reconstruction, signals the provisional nature of such forms, which remain subject to revision based on new evidence or refined methodologies. The asterisk's application extended into descriptive and during the 20th century, particularly in , where it prefixes sentences or phrases judged ungrammatical by native speakers or grammatical models. Examples include *The cat the dog chased, which violates English by lacking a or preposition, contrasting with the grammatical The cat that the dog chased. This usage, formalized in frameworks from the onward, aids in testing hypotheses about innate , though acceptability judgments can vary across dialects and contexts, prompting supplementary notations like ? for marginal cases or # for semantically anomalous but syntactically well-formed utterances. Empirical studies, such as those aggregating speaker intuitions via magnitude estimation scales, have quantified these distinctions, revealing gradients of rather than binary categories in some languages.

Phonetic Transcription and Historical Reconstruction

In , the asterisk (*) serves as a standard prefixed to reconstructed forms of words or morphemes that lack direct attestation in surviving texts, signaling their hypothetical status derived via the . This convention emerged in the amid the formalization of , where scholars inferred ancestral proto-languages from systematic correspondences among descendant tongues, such as for consonant shifts. The asterisk distinguishes these constructs from empirically verified forms, underscoring their provisional nature subject to refinement with new archaeological or textual evidence; for example, Proto-Indo-European *ph₂tḗr (reconstructed "") explains attested reflexes like Latin pater, Sanskrit pitṛ́, Greek patḗr, and English father through regular sound changes, including the loss of initial aspiration and vowel gradation. Phonetic transcription of such reconstructions typically employs symbols from the International Phonetic Alphabet (IPA) or ad hoc notations to hypothesize ancestral phonemes, with the asterisk emphasizing the form's non-empirical basis. Laryngeal consonants (e.g., *h₁, *h₂, *h₃) in Proto-Indo-European reconstructions, posited by Saussure in 1879 and later evidenced by Hittite texts from the early , illustrate this: *ph₂tḗr incorporates *h₂ to account for vowel coloring and lengthening in daughters, transcribed phonetically as [pʰa.tʰéːr] with aspirated stops and ablaut. Deeper or more speculative tiers may use double asterisks (**), as in ultra-conservative "Nostratic" proposals linking Indo-European to Uralic or Altaic, though these remain fringe due to insufficient regular correspondences. The following table exemplifies a basic cognate set for the "hundred" numeral, contrasting attested forms with the starred Proto-Indo-European reconstruction:
LanguageAttested Form
Latincentum[ˈkentum]
Greekἑκατόν (hekatón)[he.ka.tón]
śatám[ɕɑ.tɑ́m]
Proto-Indo-European*ḱm̥tóm[kʰm̥.tóːm]
This reconstruction posits a centum-type velar (*ḱ > /k/ in Western branches, /ś/ in Indo-Iranian), with ablaut and explaining variations; such notations prioritize causal sound laws over assumptions.

Gender-Inclusive Notation and Associated Empirical Critiques

In German-language contexts, the asterisk serves as a in gender-inclusive writing, known as the Gendersternchen, to denote inclusion of all genders within nouns and pronouns, such as "Studentin" or "Kollegin", interrupting the word to avoid male-generic forms like "Studenten". This practice emerged prominently in the among activists, academics, and some public institutions to challenge perceived male bias in generic masculine forms, with adoption increasing in media and education despite lacking standardization by bodies like the dictionary. Proponents argue it promotes equity by mentally activating representations of women and non-binary individuals, supported by studies showing reduced male bias in mental imagery compared to unmarked masculines. Empirical investigations into its effects yield mixed results, with some peer-reviewed experiments finding no significant reduction in text comprehensibility or aesthetic appeal. A 2021 study with 159 participants exposed to asterisk-modified texts reported equivalent comprehension scores to neutral controls, alongside neutral aesthetic ratings, though interest slightly declined. Similarly, a 2024 analysis of student samples confirmed no broad impairment from plural forms, attributing any singular-form difficulties to unfamiliarity rather than inherent flaws. However, other identifies limitations: a 2024 experiment noted decreased in singular usages due to disrupted word flow, and screen-reader incompatibility for visually impaired users, potentially exacerbating exclusion. A meta-review of 38 studies on gender-fair alternatives, including the asterisk, concluded generally neutral impacts on processing but highlighted contextual variability, such as minor representational biases. Critiques emphasize practical and ideological shortcomings, with the Gesellschaft für deutsche Sprache (GfdS), a non-profit , recommending its abandonment in 2020 for failing to handle irregular plurals (e.g., "Ärzte" vs. "Ärztinnen") and introducing orthographic inconsistencies absent from . Regional policies reflect opposition: prohibited its use in official school documents in 2024, citing readability barriers for children and ideological imposition over empirical necessity. Academic sources promoting the asterisk often align with progressive , potentially underweighting data from conservative-leaning critiques, though empirical neutrality in controlled studies tempers claims of universal harm. Usage remains low overall, affecting under 1% of tokens in analyzed corpora, suggesting limited real-world disruption despite cultural debates.

Mathematical, Statistical, and Scientific Notation

Multiplication, Exponentiation, and Algebraic Operations

In , the asterisk (*) commonly denotes the operation, particularly in contexts such as , inline expressions, and historical texts where the × symbol risks confusion with variables like x. This usage traces to at least 1631 in William Oughtred's Clavis Mathematicae, with further adoption by Johann Rahn in 1659 and widespread in programming languages for unambiguous arithmetic. For , the asterisk features in computational and array-programming contexts rather than . In the APL language, developed in 1962 by , the monadic * computes e^x (natural exponential), while dyadic y * x yields y^x (power function). FORTRAN employs ** (double asterisk) for exponentiation, a convention influencing languages like Python and reflecting the asterisk's adaptability in numerical computation. These are not conventional in algebraic texts, where ^ or superscript notation prevails. In algebraic structures, the asterisk superscript or subscript denotes specialized operations reflecting duality or transformation. In linear over fields like the reals or complexes, V^* signifies the of V, the set of continuous linear functionals V → ℝ (or ℂ), with dimension matching dim(V) under finite-dimensionality; this notation, standardized by mid-20th-century texts, enables precise handling of covectors and adjoints. For complex numbers z = a + bi, z^* = a - bi is the conjugate, preserving modulus |z^| = |z| and satisfying (z w)^ = z^* w^. In manifold theory, f_ denotes the of smooth map f: M → N, mapping tangent vectors via Df_p: T_p M → T_{f(p)} N, foundational to since the 1930s. Adjoint operators A^* satisfy ⟨A x, y⟩ = ⟨x, A^* y⟩ in Hilbert spaces, with * indicating Hermitian transpose in matrix representations. These usages, rooted in and , prioritize notational economy over explicit multiplication.

Statistical Significance and Convolution

In statistical analysis, the asterisk () serves as a superscript marker to indicate levels of in regression tables, hypothesis test outputs, and empirical summaries, with conventions varying slightly by field but commonly assigning one asterisk to p-values below 0.05, two (** ) to those below 0.01, and three (** ) to those below 0.001. This notation originated in the early amid the rise of significance testing (NHST), becoming standardized by the mid-1900s in and journals to denote rejection of the at predefined alpha levels like 5%, often symbolized by a single asterisk for the .05 threshold. Such marking facilitates quick visual assessment of result strength in dense tabular data, though it presupposes familiarity with the underlying framework, where the asterisk flags low probability of observing data under the null but does not quantify effect magnitude or practical importance. Critiques of asterisk-based significance have intensified since the American Statistical Association's 2016 statement, which highlighted risks of dichotomous thinking—treating results as "significant" or not—potentially inflating Type I errors in large samples or underpowered studies, and urged reporting precise p-values, intervals, and contextual instead. Empirical replication crises in fields like (e.g., only 36% of studies replicating significant effects in a analysis) underscore limitations, as asterisks can mask small effects amplified by p-hacking or favoring starred results. Despite this, the convention persists in software outputs (e.g., R's lm() summaries) and journals like the , reflecting inertia from its efficiency in communicating inferential claims amid vast datasets. In mathematical analysis, the asterisk denotes the convolution operator, a binary operation on functions that integrates one against the reflection and shift of the other: for integrable functions ff and gg, (fg)(τ)=f(τt)g(t)dt(f \ast g)(\tau) = \int_{-\infty}^{\infty} f(\tau - t) g(t) \, dt, producing a third function that measures overlap or "blending." This notation, distinct from pointwise multiplication (often · or juxtaposition), emerged in the 19th century alongside integral transforms—traced to Cauchy in 1821 for discrete sums and formalized continuously by Volterra in 1913—but gained the * symbol in mid-20th-century texts for its associative, commutative properties in L1L^1 spaces, enabling decomposition of complex signals into convolved components. Convolution's causal interpretation aligns with first-principles modeling of systems where outputs arise from input accumulation over time, as in probability (sum of independent random variables' densities via convolution) or physics (diffusion equations solved as Green's function convolutions). The Fourier transform converts it to multiplication—F{fg}=F{f}F{g}\mathcal{F}\{f \ast g\} = \mathcal{F}\{f\} \cdot \mathcal{F}\{g\}—facilitating efficient computation via fast Fourier transform algorithms, standard since Cooley's 1965 implementation for signal processing applications like filtering noise in datasets with over 10^6 points. While alternatives like ⋆ exist in some abstract algebra contexts, * remains canonical in analysis textbooks (e.g., Rudin's Real and Complex Analysis, 1987) for its brevity and historical precedence over explicit integral notation.

Applications in Physics, Fluid Mechanics, and Genetics

In physics, the superscript asterisk denotes the complex conjugate of a complex-valued quantity, such as a or field. For a z=x+iyz = x + iy, its conjugate is z=xiyz^* = x - iy, ensuring real-valued inner products in , where probability densities are computed as ψ2=ψψ|\psi|^2 = \psi^* \psi. This notation extends to operators, with AA^* representing the or Hermitian conjugate, satisfying Ax,y=x,Ay\langle Ax, y \rangle = \langle x, A^* y \rangle for vectors x,yx, y. In , the asterisk superscript identifies reference or critical conditions, particularly in analysis. The displacement thickness δ\delta^*, defined as δ=0(1u/U)dy\delta^* = \int_0^\infty (1 - u/U_\infty) \, dy, quantifies the streamwise displacement of the inviscid outer flow due to viscous effects in the , aiding predictions of pressure gradients and separation. In compressible flows, starred variables like speed uu^* or pressure pp^* denote sonic conditions where the equals 1, crucial for isentropic flow relations in nozzles and airfoils. In , the asterisk serves in standardized for variants and alleles. The Human Genome Variation Society (HGVS) uses * to indicate translation termination codons, as in p.Trp41* for a protein truncated at 41, and for downstream numbering of nucleotide changes beyond the stop codon, such as c.32G>A. In allele designations, it separates the gene locus from specific variants, exemplified by HLA-A01:01 for a allele, facilitating precise cataloging in databases like IMGT/HLA. This convention, established in 1987 for human genes, ensures unambiguous communication of genetic data across studies.

Domain-Specific and Cultural Uses

Sports, Games, and Notation Systems

In competitive sports, the asterisk symbol is colloquially applied to records or achievements perceived as qualified or tainted by external factors, such as rule changes, performance-enhancing substances, or shortened seasons, though official record books rarely incorporate it literally. The most prominent example originated in (MLB) during the 1961 season, when hit 61 home runs to surpass Babe Ruth's 1927 mark of 60, achieved in a 154-game schedule; MLB Commissioner proposed appending an asterisk to Maris's total due to the expanded 162-game season, but this was never formally implemented in official records and was later abandoned. In the late 1990s and early 2000s steroid era, public discourse intensified calls for asterisks on single-season home run records set by (70 in 1998), (66 in 1998), and (73 in 2001), amid revelations of their use of anabolic steroids and other banned substances, though MLB has maintained these totals without qualifiers in its record books to avoid subjective judgments. Beyond , asterisks appear in other ' scoring and leaderboards for practical notation. In tournaments, an asterisk beside a player's name on leaderboards denotes that they teed off on the back nine (holes 10-18) rather than the front nine, aiding quick visual distinction of starting positions in multi-tee starts. In broader athletic contexts, such as high school or collegiate sports schedules, asterisks mark home games, forfeited matches due to eligibility violations, or counts in rosters, serving as footnotes for contextual details without altering the core statistic. In games and notation systems, the asterisk functions as a terminator or qualifier. In chess, (PGN), a standard text format for recording games since its formalization in the early , uses a lone asterisk (*) at the end of move lists to indicate an ongoing, incomplete, or unfinished game, distinguishing it from results like "1-0" ( wins) or "1/2-1/2" (draw). This usage ensures compatibility across chess software and databases, where the symbol acts as a self-terminating token without implying evaluation symbols like "!" for good moves. In some tabletop or card games' rulebooks, asterisks denote special conditions, such as or purchase restrictions, though this varies by title and lacks standardization akin to sports records. Overall, the asterisk's role emphasizes transparency in notation, highlighting deviations from baseline conditions to preserve interpretive accuracy in competitive contexts.

Telephony, Keypads, and Signaling

The asterisk symbol (*) designates the "star key" on the standard 12-button telephone keypad, positioned at the intersection of the first row and first column in the 3-by-4 numeric array (excluding the 0 key's position). This configuration emerged from human factors research conducted by Bell Laboratories in the late 1950s and early 1960s, culminating in the dual-tone multi-frequency (DTMF) signaling system designed to supplant rotary pulse dialing with faster, more reliable push-button input. The DTMF keypad layout, including the asterisk, was finalized after extensive testing to optimize finger reach, error rates, and dialing speed, with the non-numeric asterisk and pound (#) keys incorporated to enable signaling for emerging network services beyond digit-only addressing. DTMF technology, trademarked as Touch-Tone by the Bell System, entered commercial service on November 18, 1963, initially with 10-button keypads omitting the asterisk and pound for civilian use, though full 12-button versions proliferated by the late 1960s to support expanded functionalities. Actuation of the asterisk key generates a composite audio signal comprising a low-frequency tone of 697 Hz and a high-frequency tone of 1209 Hz, transmitted in-band over the analog voice channel to convey the symbol to switching equipment or endpoints. These tones adhere to the DTMF matrix standard, where rows correspond to low frequencies (697, 770, 852, and 941 Hz) and columns to high frequencies (1209, 1336, 1477, and 1633 Hz for military-grade extensions), ensuring robust detection amid voice traffic through orthogonal frequency selection that minimizes crosstalk. In telephony operations, the primarily initiates vertical service codes—short sequences prefixed by the star key to invoke subscriber features without operator intervention. Common examples in North American networks include *67 to suppress on outbound calls, *69 to return the most recent incoming call (introduced in 1960s trials and widespread by the 1980s), and *72 to activate unconditional , with deactivation via *73; these codes, standardized variably by carriers like and Verizon, leverage the asterisk's distinct tone to differentiate service requests from dialed numbers. Such usage extends to (IVR) systems, where the asterisk tone signals options like menu resets or input cancellations, and in private branch exchange (PBX) environments for functions such as call parking or operator recall. Signaling applications of the asterisk encompass both and enterprise contexts, where its DTMF signature facilitates automated call , remote diagnostics, and tone-based control in legacy analog systems persisting into digital VoIP transitions. In early DTMF deployments, the asterisk's inclusion anticipated scalable services like automated collection verification and trunk signaling, though modern protocols (e.g., SIP with RFC 4733 for out-of-band DTMF) emulate its role to maintain compatibility with embedded keypads. Empirical testing by confirmed the asterisk's tones yielded detection accuracies exceeding 99% under typical line conditions, underpinning its reliability in high-volume networks handling billions of annual activations.

Music, Religious Texts, and Symbolic Representations

In ancient of religious scriptures, the asterisk, derived from the Greek asteriskos meaning "little star," was utilized by of in the early CE within his —a comparative edition of versions—to denote verses present in the Greek translation but absent from the Hebrew text, signaling additions or interpolations requiring scholarly attention. This practice, paired with the for suspected omissions, facilitated critical comparison across Hebrew, Greek, and other renditions, influencing subsequent biblical scholarship despite the Hexapla's partial survival only in fragments. Medieval scribes extended this application in copying, employing asterisks to highlight passages drawn from alternative sources or to link marginal annotations to the main body, thereby preserving textual variants amid transmission challenges. In Jewish midrashic traditions and Talmudic texts, asterisk-like marks, sometimes termed asteriscus, appeared in manuscripts to indicate interpretive expansions or cross-references, aiding rabbinic though less standardized than Origen's system. During the , asterisks in Hebrew-derived Christian texts marked translations or glosses from Hebrew originals, underscoring the symbol's role in bridging linguistic and doctrinal divides in scriptural editing. Within , particularly in sacred and psalmody, asterisks have served niche functions; for instance, in certain psalm-tone terminations, an asterisk appended to a mode letter (e.g., A*) signals an extended final ascending to the note above, a convention observed in Gregorian and related repertoires to accommodate textual phrasing. In modern scores, asterisks occasionally denote performance cues, such as slight delays ("let the time wait") on specific notes or pedal lifts in music, though these uses remain ad hoc rather than systematic. Symbolically, the asterisk evokes its etymological roots as a star, historically representing celestial or divine notation in manuscripts where it flagged significant or extraneous content, akin to a amid textual obscurity. This stellar connotation persists in liturgical contexts, such as the Eastern Orthodox asterisk—a metal star-shaped implement hovering over Eucharistic elements to prevent contact—though physically distinct, it echoes the symbol's ancient form and protective, demarcating intent in ritual purity. In broader , the asterisk's star-like form has occasionally substituted for asterisks in heraldic or emblematic designs denoting emphasis or omission, reinforcing its meta-textual role without evolving into standalone religious symbology.

Economics, Education, and Unique Language Variations


In economic theory, the superscript asterisk denotes equilibrium or optimal values in models, distinguishing them from initial or observed variables. For instance, pp^* represents the equilibrium price where supply equals in competitive markets, derived through solving simultaneous equations for . Similarly, yy^* indicates steady-state output in growth models, as used in dynamic spatial general equilibrium analyses. This convention, rooted in , highlights outcomes of behavior under given constraints.
In education systems, particularly in the , the A* grade signifies superior performance in public examinations such as GCSEs and A-levels, typically requiring raw scores equivalent to 90% or higher to differentiate elite achievers from standard A grades. Introduced for A-level in 1991 and expanded across subjects by 2010, A* addresses by setting higher thresholds, with only about 8-10% of candidates attaining it annually in core subjects. Outside grading, asterisks appear in pedagogical texts for clarifying complex concepts or denoting corrections in student work. In linguistic analysis, the asterisk prefixes reconstructed forms in , marking unattested proto-words inferred from comparative data, such as *ph₂tḗr for the of "," absent from direct records but supported by cognates across daughter languages. This usage, standardized since the , underscores hypothetical status while enabling systematic phylogeny tracing. In descriptive and , a leading asterisk flags ungrammatical or impossible constructions, e.g., *, to demonstrate syntactic deviance despite semantic coherence. Informally, in digital vernaculars like online forums, asterisks enclose actions or emphasis—nods for gestures or stresses for italics—evolving as a non-standard orthographic variant for conveying prosody in text-based communication.

Debates, Criticisms, and Cultural Implications

Effectiveness and Psychological Impact of Censorship Uses

The asterisk's application in censoring , as in "fck" or "sht", seeks to attenuate perceived offensiveness by obscuring portions of terms while preserving contextual meaning. Empirical assessments of such practices reveal limited efficacy in concealing the referent word, as recipients typically reconstruct the full from orthographic patterns, , and situational cues. In a 2016 Ofcom-commissioned survey of audiences on broadcast , the of respondents indicated that censored swear words—often via asterisks or bleeps—were readily comprehensible, with understanding rates exceeding 80% for common terms, thereby failing to fully suppress exposure to the underlying . This aligns with linguistic conventions where partial veiling relies on shared knowledge, rendering the method more symbolic than substantive in blocking comprehension. Research on profanity's persuasive and perceptual effects further underscores the asterisk's inefficacy. A 2022 study in the Journal of Marketing Research examined swear word variants in consumer reviews, including asterisk-censored forms like "holy sh*t"; while such modifications enable speakers to suppress overt and reduce phonetic salience, they do not eliminate the term's inferential impact on reader attitudes, with censored instances still evoking similar evaluative responses to uncensored ones in low-context scenarios. 's arousal-enhancing properties, which can bolster message by signaling intensity, persist post-censorship, as partial forms maintain the taboo's connotative without diluting its emotional valence. Conversely, in high-stakes reporting, asterisk use has been critiqued for understating profanity's centrality—such as in legal —while inviting mental completion that sustains or heightens the word's provocative sting, potentially eroding narrative authenticity. Psychologically, asterisk censorship exerts subtle influences on cognition and social signaling. Readers encountering veiled profanity often experience heightened focal attention to the obscured element, akin to ironic rebound effects in suppression tasks, where attempted avoidance amplifies mental activation of the forbidden content. This can foster frustration or infantilization among audiences presumed incapable of handling unfiltered , as noted in analyses of media self-regulation, where the convention signals cautionary deference to norms without mitigating visceral responses. For producers, habitual self-censorship via asterisks may habituate reduced authenticity in expression, correlating with broader patterns of linguistic hedging that dilute rhetorical force, though direct causal links remain underexplored. In multilingual or contexts, first-language swear words retain elevated perception even when censored, suggesting asterisks inadequately buffer emotional tied to native phonological processing. Overall, while providing superficial compliance with decorum standards, the practice yields negligible reductions in offensiveness and may inadvertently reinforce profanity's salience through anticipatory decoding.

Readability and Cognitive Costs in Inclusive Language Reforms

The gender asterisk, known as Gendersternchen in German, is employed in inclusive language reforms to denote or inclusivity by inserting the symbol within compound nouns, such as Lehrerin* for "" encompassing , , and non-binary identities. This practice, promoted since the mid-2010s in official German communications and media, aims to challenge perceived male-centric generics but has sparked debate over its impact on text processing. Critics contend that the non-alphabetic insertion disrupts standard orthographic , potentially elevating by interfering with lexical access in models like the dual-route cascade framework, where unfamiliar graphemes slow sublexical assembly. Empirical investigations using lexical decision tasks reveal no substantial objective hindrance to word recognition speed or accuracy from the asterisk form compared to masculine or feminine variants. In a study with 103 native German speakers processing 72 role nouns, reaction times showed no significant differences across conditions (p > 0.05), with error rates marginally higher for asterisk forms (5.2%) than masculine (4.4%) or feminine (4.7%), though not statistically robust via post-hoc tests. Processing efficiency improved over trials, indicating adaptation through familiarity rather than inherent disruption. However, subjective assessments diverge: in experiments contrasting asterisk-inclusive texts, participants rated singular forms (e.g., derdie Spielerin) as more difficult and less comprehensible than plurals (e.g., die Spielerinnen*), with decreased perceived language variety and interest in one sample of 127 participants (mean age 26.93). Plural contexts yielded neutral or slightly positive effects on perceived in another group of 159 (mean age 31.40). These subjective costs suggest an initial cognitive burden from orthographic novelty, particularly under higher loads like singular , where the asterisk may demand additional phonological or morphological reconciliation. Increased cognitive demands in stressful or multitasking scenarios could exacerbate reversion to habitual forms, as evidenced by reduced inclusive usage under load in attitude surveys. For populations with reading impairments, such as , the intrusion of non-standard symbols risks amplifying decoding errors, though direct studies remain scarce; analogous research on irregular implies heightened effort for atypical letter-like elements. Proponents counter that familiarity mitigates deficits, with longitudinal exposure normalizing processing akin to dialectal variations, yet persistent aesthetic aversion—reported in over 20% of respondents across surveys—may sustain perceived barriers to adoption. Broader implications include trade-offs in communication efficiency: while objective metrics affirm viability, the asterisk's visual salience could fragment attention in dense texts, paralleling findings on punctuation overload in readability indices like Flesch-Kincaid, where symbol density correlates with grade-level inflation. Reforms mandating such forms in or documents, as in Germany's 2021 administrative guidelines, thus impose adaptation demands unevenly, potentially widening gaps for non-native or elderly readers unfamiliar with the convention since its proliferation post-2018. Empirical consensus leans against severe objective impairment but underscores subjective and contextual costs, warranting balanced implementation to preserve informational clarity.

Broader Critiques of Symbolic Over-Reliance and Historical Biases

Critics contend that the asterisk's integration into -inclusive language forms, such as the German "Gendersternchen" (e.g., "Bürger*innen" for citizens), exemplifies an over-reliance on symbolic interventions that compromise textual clarity and processing efficiency. Empirical experiments involving native speakers have shown that sentences with the gender asterisk elicit lower ratings, reduced aesthetic appeal, and slower reading times compared to standard masculine generics or alternatives like the interior colon. These findings suggest that such symbols disrupt phonological and morphological expectations, imposing cognitive burdens without demonstrable gains in perceived inclusivity beyond self-reported ideological preferences. The Gesellschaft für deutsche Sprache, Germany's preeminent linguistic institution, formally advised against the asterisk in 2020, arguing it fails to accommodate irregular plurals (e.g., "Studenten" where endings do not uniformly apply) and fragments words in ways incompatible with or screen readers for the visually impaired. Opponents, including linguists and policymakers, describe this usage as ideologically imposed orthographic experimentation, prioritizing non-binary representation over grammatical coherence and empirical validation of its societal impact. This pattern extends to broader symbolic practices, where asterisks in (e.g., "f*ck") or emphasis serve as proxies for obscured content, potentially reinforcing taboos through implication rather than resolution, as noted in typographical analyses of concealment versus revelation. Historically, the asterisk originated in Hellenistic textual criticism around the 2nd century BCE, employed by scholars like to flag passages for transposition or authenticity in Homeric texts, often signaling editorial doubt or relocation. Such applications introduced subjective es, as decisions on what merited marking reflected the critic's philological assumptions—favoring standards over variant traditions—potentially marginalizing non-canonical interpretations in classical and biblical scholarship. Modern extensions of this symbolic tradition into linguistic reforms mirror these historical precedents, where institutional endorsements in academia—frequently aligned with progressive paradigms—overlook counter-evidence of readability deficits, perpetuating a toward symbolic equity gestures at the expense of functional evolution. This over-reliance risks diluting the asterisk's utility as a precise marker, transforming it from a tool of scholarly precision into a vehicle for unverified social engineering.

References

  1. https://www.frontiersin.org/journals/[psychology](/page/Psychology)/articles/10.3389/fpsyg.2021.760062/full
  2. https://www.[researchgate](/page/ResearchGate).net/publication/382664254_Does_the_gender_asterisk_Gendersternchen_as_a_special_form_of_gender-fair_language_impair_comprehensibility
Add your contribution
Related Hubs
Contribute something
User Avatar
No comments yet.