/ Dictionary / Index Y yohimbine: Meaning and Definition of Find definitions for: yo•him•bine Pronunciation: (yō-him'bēn), [key] — n. Pharm. an alkaloid, CHNO, extracted from the bark of Corynanthe johimbe or Rauwolfia serpentina, used as a selective alpha-adrenergic receptor antagonist: purported to have aphrodisiac properties. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yohimbe yo-ho Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language