Definitions for "Primary sex characteristics"
Organs directly related to reproduction, which enlarge and mature during adolescence. Compare secondary sex characteristics. (333)
any of the physical characteristics differentiating male and female individuals; directly responsible for reproduction.
Physical characteristics present at birth and that are used by those around an infant to determine its biological sex, including penis and scrotum to identify the infant as male or vulva, vagina, clitoris, and labia to identify the infant as female