- 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 quinine; from quina, cinchona bark (; from Spanish ; from Quechua quinina, medicinal plant) + -ine
- A bitter, colorless, amorphous powder or crystalline alkaloid, C20H24N2O2·3H2O, derived from certain cinchona barks and used in medicine to treat malaria.
- Any of various compounds or salts of quinine.