from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A bitter, colorless, amorphous powder or crystalline alkaloid, C20H24N2O2·3H2O, derived from certain cinchona barks and used in medicine to treat malaria.
- n. Any of various compounds or salts of quinine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A bitter colourless powder, an alkaloid derived from cinchona bark, used to treat malaria and as an ingredient of tonic water.
from the GNU version of the Collaborative International Dictionary of English
- n. An alkaloid extracted from the bark of several species of cinchona (esp. Cinchona Calisaya) as a bitter white crystalline substance, C20H24N2O2. Hence, by extension (Med.), any of the salts of this alkaloid, as the acetate, chloride, sulphate, etc., employed as a febrifuge or antiperiodic. Called also quinia, quinina, etc.
from The Century Dictionary and Cyclopedia
- n. A very important vegetable alkali (C20H24N2O2), obtained from the bark of several trees of the genus Cinchona.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a bitter alkaloid extracted from chinchona bark; used in malaria therapy
From Spanish quina ("cinchona bark"), from Quechua kina. (Wiktionary)