/ Dictionary / Index C chloroquine: Meaning and Definition of Find definitions for: chlo•ro•quine Pronunciation: (klôr'u-kwin, -kwēn", klōr'-), [key] — n. Pharm. a synthetic substance, CHClN, used chiefly to control malaria attacks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: chloroquine (Thesaurus) chloroprene chlorosis Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language