- a bitter, crystalline alkaloid, CHNO, extracted from cinchona bark
- any compound of this, as quinine sulfate, used in medicine for various purposes, esp. for treating malaria
Origin of quininefrom quina, cinchona bark ( from Spanish from Quechua quinina, medicinal plant) + -ine
A bitter alkaloid, C20H24N2O2, derived from the bark of several species of cinchona, used usually in the form of its sulfate salt to treat malaria and formerly to treat leg cramps. It is used in the form of its hydrochloride or sulfate salt as a flavoring, especially in tonic water.