/ Dictionary / Index M muscarine: Meaning and Definition of Find definitions for: mus•ca•rine Pronunciation: (mus'kur-in, -ku-rēn"), [key] — n. Chem. a poisonous compound, CHNO, found in certain mushrooms, esp. fly agaric, and in decaying fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. muscari muscarinic Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language