Biological woman. Someone who is born biologically female, with female sex organs. Does not necessarily identify as female, however.
Chaz Bono is a bio woman. He is transgender and currently transitioning physically to a man, but he was born biologically female.

Alexis Arquette is NOT a bio woman. She was born biologically male, but has transitioned physically to a female.
by klawbie August 12, 2011
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A bio woman is a female presenting humanoid that, internally, is a space lizard.

Alt: person who’s having anti-trans drama about the words “cis gender.”
by Semifunctional July 13, 2021
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