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quinine (n.)

vegetable alkaloid having curative properties, obtained from the bark of the cinchona tree, 1821, from French quinine (1820), with chemical ending -ine (2) + Spanish quina "cinchona bark" (from which it is extracted), from Quechua (Inca) kina. Earlier in reduplicated form quinaquina (1727).

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Definitions of quinine from WordNet

quinine (n.)
a bitter alkaloid extracted from chinchona bark; used in malaria therapy;
From wordnet.princeton.edu