/ ˈepɪsiːn; NAmE / adjective
1.
( formal ) having characteristics of both the male and female sex or of neither sex in particular :
epicene beauty
2.
( grammar ) ( of a word ) having one form to represent male and female :
You can write 's / he' as an epicene pronoun when you are not referring to men or women in particular.
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WORD ORIGIN
late Middle English (as a grammatical term): via late Latin from Greek epikoinos (based on koinos common).