The Collaborative International Dictionary
Antiaphrodisiac
Antiaphrodisiac \An`ti*aph`ro*dis"i*ac\, a. & n. Same as Antaphrodisiac.
Wiktionary
antiaphrodisiac
n. Any substance that reduces sexual attraction.
Usage examples of "antiaphrodisiac".
It wasn’t the romantic gift one might think it was, but kind of a vampire antiaphrodisiac.