Gender symbol

A gender symbol is a pictogram or glyph used to represent sex and gender, for example in biology and medicine, in genealogy, or in the sociological fields of gender politics, LGBT subculture and identity politics.

In his books Mantissa Plantarum (1767) and Mantissa Plantarum Altera (1771), Carl Linnaeus regularly used the planetary symbols of Mars, Venus and Mercury – ♂, ♀, ☿ – for male, female and hermaphroditic (perfect) flowers, respectively. Botanists now use ⚥ for the last.

In genealogy, including kinship in anthropology and pedigrees in animal husbandry, the geometric shapes △ or □ are used for male and ○ for female. These are also used on public toilets in some countries.

The modern international pictograms used to indicate male and female public toilets, 🚹︎ and 🚺︎, became widely used in the 1960s and 1970s. They are sometimes abstracted to ▽ for male and △ for female.

The three standard sex symbols in biology are male ♂, female ♀ and hermaphroditic ⚥; originally the symbol for Mercury, ☿, was used for the last. These symbols were first used by Carl Linnaeus in 1751 to denote whether flowers were male (stamens only), female (pistil only) or perfect flowers with both pistils and stamens. (Most flowering and conifer plant species are hermaphroditic and either bear flowers/cones that themselves are hermaphroditic, or bear both male and female flowers/cones on the same plant.) These symbols are now ubiquitous in biology and medicine to indicate the sex of an individual, for example of a patient.

Kinship charts use a triangle △ for male and circle ○ for female. Pedigree charts published in scientific papers use an earlier anthropological convention of a square □ for male and a circle ○ for female.

Before a shape distinction was adopted, all individuals had been represented by a circle in Morgan's 1871 System of Consanguinity and Affinity of Human Family, where gender is encoded in the abbreviations for the kin relation (e.g. M for 'mother' and F for 'father'). W. H. R. Rivers distinguished gender in the words of the language being recorded by writing male kinship terms in all capitals and female kinship terms with normal capitalization. That convention was quite influential for a time, and his convention of prioritizing male kin by placing them to the left and females to the right continues to this day though there have been exceptions, such as Margaret Mead, who placed females to the left.

The modern gender symbols used for public toilets, 🚹︎ for male and 🚺︎ for female, are pictograms created for the British Rail system in the mid-1960s. Before that, local usage had been more variable. For example, schoolhouse outhouses in the 19th-century United States had ventilation holes in their doors that were shaped like a starburst Sun ✴ or like a crescent Moon ☾, respectively, to indicate whether the toilet was for use by boys or girls. The British Rail pictograms – often color-coded blue and red^{[citation needed]} – are now the norm for marking public toilets in much of the world, with the female symbol distinguished by a triangular skirt or dress, and in early years (and sometimes still) the male symbol stylized like a tuxedo.