Main Entry: coitus in·ter·rup·tus Pronunciation: -"int-&-'r&p-t&s Function: noun : coitus in which the penis is withdrawnprior to ejaculation to prevent the deposit of sperm in the vagina
coitus interruptus coitus in·ter·rup·tus (ĭn'tə-rŭp'təs) n. Sexual intercourse deliberately interrupted by withdrawal of the penis from the vagina prior to ejaculation. Also called onanism.