Breadcrumb Home > Dictionary > Index Q Cite quinine: Meaning and Definition of Find definitions for: qui•nine Pronunciation: (kwī'nīn, kwin'īn or, esp. Brit., kwi-nēn'), [key] — n. Chem., Pharm. a white, bitter, slightly water-soluble alkaloid, CHNO, having needlelike crystals, obtained from cinchona bark: used in medicine chiefly in the treatment of resistant forms of malaria. a salt of this alkaloid, esp. the sulfate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quinine (Thesaurus) quiniela quinine water TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News The Holocaust (1933–1945) Chinese New Year History, Meaning, and Celebrations Noble Titles and Ranks in a Monarchy The 5 Best Air Purifiers of 2020 Inaugural Trivia Related Content Daily Word Quiz: obviate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language