1892; see homosexual + -ity.
homosexuality ho·mo·sex·u·al·i·ty (hō'mə-sěk'shōō-āl'ĭ-tē, -mō-)
n.
Sexual orientation to persons of the same sex.
Sexual activity with another of the same sex.
A sexual attraction between persons of the same sex. (See gay and lesbian; compare heterosexuality.)