/ Dictionary / Index C cinchonidine: Meaning and Definition of Find definitions for: cin•chon•i•dine Pronunciation: (sing-kon'i-dēn", -din, sin-), [key] — n. Pharm. a white, crystalline, slightly water-soluble, levorotatory alkaloid, CHNO, stereoisomeric with cinchonine and similarly derived, used chiefly as a quinine substitute. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cinchona cinchonine Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language