secondary sexual characteristic

https://doi.org/10.1351/goldbook.11198

Feature of the adult animal, appearing during puberty in humans and distinct between the sexes, although not part of the reproductive system.

Note: Examples include enlargement of the female breasts and sex-specific patterns of body hair, such as facial hair in the male and the male or female pubic escutcheon.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 802 [Terms] [Paper]