Sui generis
Sui generis (; ) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."
Transgender
Among the ancient Middle Eastern Akkadian people, a "salzikrum" was a person who appeared biologically female but had distinct male traits. "Salzikrum" is a compound word meaning "male daughter." According to the Code of Hammurabi, "salzikrūm" had inheritance rights like that of priestesses; they inherited from their fathers, unlike regular daughters. A "salzikrum's" father could also stipulate that she inherit a certain amount.