(1):
(a. & n.) Common to both sexes; - a term applied, in grammar, to such nouns as have but one form of gender, either the masculine or feminine, to indicate animals of both sexes; as boy^s, bos, for the ox and cow; sometimes applied to eunuchs and hermaphrodites.
(2):
(a. & n.) Fig.: Sexless; neither one thing nor the other.