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caffeine 音標拼音: [kæf'in] n. 咖啡因,茶精(興奮劑) 咖啡因,茶精(興奮劑) caffeine n 1: a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects [synonym: {caffeine}, {caffein}] caffein \caf*fe"in\, Caffeine \Caf*fe"ine\, n. [Cf. F. caf['e]ine. See {Coffee}.] (Chem.) A white, bitter, crystallizable substance, found in coffee and tea. It is identical with the alkaloid {theine} from tea leaves, and with {guaranine} from guarana. It is responsible for most of the stimulating effect of coffee or tea. [1913 Webster WordNet 1.5] |
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