/ Dictionary / Index C cinchonism: Meaning and Definition of Find definitions for: cin•chon•ism Pronunciation: (sing'ku-niz"um, sin'-), [key] — n. Pathol. poisoning by any of the cinchona alkaloids, characterized by headache, deafness, and ringing in the ears. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cinchonine Cincinnati 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