transvestite

Etymology

From Latin trans + vestite, form of vestiō (“I clothe, I dress”) (as in English vestment, vest). Literally, a "cross-dresser". From transvestitism, from German Transvestitismus, coined in 1910 by Magnus Hirschfeld (the practice itself is much older).

noun

1. A person who sometimes wears clothes traditionally worn by and associated with the opposite sex; typically a male who cross-dresses occasionally by habit or personal choice.
   Even though Steven used to dress up in his sister's clothes, it still came as a surprise he ended up as a transvestite.
2. (clinical psychology, psychiatry, pathology) A person, typically a heterosexual male, who compulsively seeks and derives paraphilic sexual arousal from cross-dressing, especially if the urges and behavior cause the patient distress or social impairment.