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(linguistics) Of or relating to a class of Greek and Latin nouns that may refer to males or females but have a fixed grammatical gender (feminine, masculine, neuter, etc.).
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(linguistics) Of or relating to nouns or pronouns in any language that have a single form for male and female referents.
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(by extension) Suitable for use regardless of sex; unisex.
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(biology and figuratively) Of indeterminate sex, whether asexual, androgynous, hermaphrodite, or intersex; of a human face, intermediate in form between a man's face and a woman's face.
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(by extension) Indeterminate; mixed.
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(by extension, usually derogatory) Of a man: effeminate.