third sex

noun3

1. •
   A third gender, a category of people who are not male or female, or whose sexual roles, anatomy, or identities place them outside of the established male and female categories.

   • The words of St. Paul in Cor. vii., of Our Lord in Mat. xix., concerning the third sex of the eunuchs, and of St. John in Apoc. xiv., […] — 1913
2. •
   (old-fashioned) Gay people.
3. •
   (old-fashioned) The clergy, the priesthood (seen as emasculate or not participating in sex).

   • The richest of the lands of Mexico were owned by the blackrobed members of [the] Third Sex, the Clergy. Over the humblest peon family they wielded supreme sway through their fat itinerant friars. — 1918