Quinine meaning in english. QUININE definition: a white, bitter, slightly water-soluble alkaloid, C 2 0 H 2 4 N 2 O 2 , having needlelike crystals, obtained from cinchona bark: used in medicine chiefly in the treatment of resistant forms of malaria. Define quinine. What does quinine mean? Information and translations of quinine in the most comprehensive dictionary definitions resource on the web. Under ultraviolet light, the quinine in tonic water fluoresces, as seen with this bottle of Canada Dry tonic water. Originally used as a prophylactic against malaria, modern tonic water typically has a significantly lower quinine content and is often more sweetened than the original medicinal form. Quinine is a basic amine and is usually provided as a salt. A few species are reportedly naturalized in Central America, Jamaica, French Polynesia, Sulawesi, Saint Helena in the South Atlantic, and São Tomé Comprehensive high school English grammar and composition textbook by Wren & Martin, covering parts of speech, tenses, and writing skills. quinine /kwɪˈniːn; US: ˈkwaɪnaɪn/ n a bitter crystalline alkaloid extracted from cinchona bark, the salts of which are used as a tonic, antipyretic, analgesic, etc, and in malaria therapy. Click for pronunciations, examples sentences, video. How to pronounce QUININE. dxcz jbclxafp eny zufj ywiyw etigqr llnrgp cttmi ztgo gdv