# biological sex

> English word · Noun

## Definitions
1. sex, as in the biological factors that cause an individual member of a species that uses sexual reproduction to produce either male gametes (sperm or spermatozoa) or female gametes (ova).
2. Synonym of birth sex (“sex assigned to a person when born”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/biological-sex