primary sexual characteristic

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Noun1.primary sexual characteristic - the genetically determined sex characteristics bound up with reproduction (genitals and organs of reproduction)
sex character, sex characteristic, sexual characteristic - those characteristics (both anatomical and psychological) that are strongly associated with one sex relative to the other
References in periodicals archive ?
Perper's Sex Signals: The Biology of Love argues that "secondary" sexual characteristics such as hair growth are still imagined to conform to a strict bipolarity because they are seen as emblematic essences -- emblematic of primary sexual characteristics which are now almost always imagined as "naturally" bipolar (184-86).