The biological condition of having distinct male and female sexes, where individuals are either one sex or the other (not both).
From Greek 'gono-' (reproductive) and 'chorizo' (to separate), literally meaning 'separated reproduction.' Used since the 1800s in evolutionary biology.
Most animals are gonochoristic (separate sexes), but some fish and snails break the rules with hermaphroditism—nature keeps reminding us that our categories are just convenient labels.
Complete word intelligence in one call. Free tier — 50 lookups/day.