Dictionary  tro•pinePronunciation: (trō'pēn, -pin), [key] —n. Chem. a white, crystalline, hygroscopic, water-soluble, poisonous alkaloid, C8H15NO, obtained chiefly by the hydrolysis of atropine or hyoscyamine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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