primary sex characteristic

primary sex characteristic

noun Anatomy.
any of the body structures directly concerned in reproduction, as the testes, ovaries, and external genitalia.
Also called primary sex character.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
primary sex characteristic

noun
the genetically determined sex characteristics bound up with reproduction (genitals and organs of reproduction) 
WordNet® 3.0, © 2006 by Princeton University.
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