Futanari (ふたなり, seldom: 二形, 双形, literally: dual form; 二成, 双成, literally: "[to be of] two kinds") is the Japanese word for hermaphroditism, which is also used in a broader sense for androgyny.
Beyond Japan, the term has come to be used to describe a commonly pornographic genre of eroge, manga, and anime which includes characters that show both primary sexual characteristics. In today's language it refers almost exclusively to characters who have an overall feminine body, but have both female and male primary genitalia (although testicles are not always present). The term is also often abbreviated as futa(s), which is also used as a generalized term for the works themselves.