Quinine
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.
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