[ sing-kuh-neen, -nin, sin- ]
/ ˈsɪŋ kəˌnin, -nɪn, ˈsɪn- /

noun Pharmacology.

a colorless, crystalline, slightly water-soluble alkaloid, C19H22N2O, a stereoisomer of cinchonidine, obtained from the bark of various species of cinchona and used chiefly as a quinine substitute.

Origin of cinchonine

First recorded in 1815–25; cinchon(a) + -ine2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cinchonine

British Dictionary definitions for cinchonine


/ (ˈsɪŋkəˌniːn) /


an insoluble crystalline alkaloid isolated from cinchona bark, used to treat malaria. Formula: C 19 H 22 N 2 O
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for cinchonine


[ sĭngkə-nēn′, sĭnchə- ]


An alkaloid derived from the bark of various cinchona trees and used as an antimalarial agent.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.