"one having characteristics of both sexes," 1917, from German intersexe (1915); see inter- "between" + sex (n.). Coined by German-born U.S. geneticist Richard Benedict Goldschmidt (1878-1958). Intersexual is from 1866 as "existing between the sexes, pertaining to both sexes;" from 1916 as "having both male and female characteristics." Related: intersexuality.
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