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.
[1][2]: 79, 81 
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 primary sexual characteristics from both 
females and 
males.
[1] 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 a 
scrotum is not always present, while 
breasts, a 
penis, and a 
vulva are). The term is also often abbreviated as 
futa(s), which is also used as a generalized term for the works themselves.
[2]