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1. A person whose sexual orientation is toward persons of the opposite sex. 2. Relating to or characteristic of heterosexuality. 3. One whose interests and behavior are characteristic of heterosexuality.
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het·ero·sex·u·al .het-ə-rō-'seksh-(ə-)wəl, -'sek-shəl adj
1 a) of, relating to, or characterized by a tendency to direct sexual desire toward individuals of the opposite sex compare HOMOSEXUAL (1)
b) of, relating to, or involving sexual intercourse between a male and a female <sexual relationships between individuals of opposite sexes are \heterosexual (A. C. Kinsey)> compare HOMOSEXUAL (2)
2) of or relating to different sexes
het·ero·sex·u·al·ly -'seksh-(ə-)wə-lē, -'sek-shə-lē adv
heterosexual n a heterosexual individual
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het·ero·sex·u·al (het″ər-o-sekґshoo-əl) 1. pertaining to the opposite sex; directed toward a person of the opposite sex, as opposed to homosexual. 2. one who is sexually attracted to persons of the opposite sex. 3. contrasexual (def. 2).Medical dictionary. 2011.