a poisonous alkaloid, CHNO, obtained from quebracho bark and the bark of a West African tree (Corynanthe yohimbé) of the madder family: formerly used as an aphrodisiac
See yohimbine in American Heritage Dictionary 4
(yō-hĭmˈbēnˌ)
noun
A poisonous alkaloid, C21H26N2O3, derived from the bark of a tree, Corynanthe yohimbe, and formerly used as an aphrodisiac, a local anesthetic, and a mydriatic.