a bitter alkaloid extracted from chinchona bark; used in malaria therapy
An alkaloid with the chemical formula C₂₀H₂₄N₂O₂ derived from cinchona bark (from plants of the genus Cinchona) used to treat malaria and as an ingredient of tonic water, which presents as a bitter colourless powder; also, a drug containing quinine or a chemical compound derived from it.
To treat (someone) with quinine.