Lexic.us

Definition of Quinine

1. Noun. A bitter alkaloid extracted from chinchona bark; used in malaria therapy.

Definition of Quinine

1. 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.

Definition of Quinine

1. a medicinal alkaloid [n -S]

Medical Definition of Quinine

1. An alkaloid isolated from cinchona bark. Used as an antimalarial. It is believed to act by raising the pH of endocytotic vesicles and inhibiting internal membrane fusion processes. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Quinine

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