quinine

Definition

An alkaloid with the chemical formula C₂₀H₂₄N₂O₂, originally 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.

Etymology

The noun is either: * derived from Spanish quina (“quinine”) (a clipping of quinaquina (“Cinchona bark”)) + English -ine (suffix forming names of chemical substances, especially (among others) alkaloidal substances); or * borrowed from French quinine, from quin(quina) (“Cinchona bark”) + -ine (feminine form of -in (suffix forming nouns)). Spanish quinaquina and French quinquina are both derived from Quechua kina-kina, a reduplication of kina (“bark; (specifically) Cinchona bark”). The verb is derived from the noun.

Example Sentences

• "The alkali of yellow bark may be distinguished from cinchonine by the name of quinine."
• "The quinine, being more potent than cinchonine, is generally preferred."
• "In spite of quinine, the men sickened day by day. Many of them, fine, strong, active fellows, who had never known what a day's sickness meant, went down before the malarious mist that gathered in the jungles."