英语词汇“caffein”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	caffein
释义	WordReference Random House Learner's Dictionary of American English © 2024 caf•feine /ˈkæfin/USA pronunciation n. [uncountable] Nutritiona white, bitter chemical, obtained from coffee or tea, used in medicine as a stimulant. WordReference Random House Unabridged Dictionary of American English © 2024 caf•feine (ka fēn′, kaf′ēn, kaf′ē in),USA pronunciation n. [Chem., Pharm.] Nutritiona white, crystalline, bitter alkaloid, C₈H₁₀N₄O₂, usually derived from coffee or tea: used in medicine chiefly as a nervous system stimulant. `Also, caf•fein′.` French caféine, equivalent. to café coffee + -ine -ine² 1820–30; caf•fein•ic (ka fē′nik, kaf′ē in′ik),USA pronunciation adj. Collins Concise English Dictionary © HarperCollins Publishers:: caffeine, caffein /ˈkæfiːn; ˈkæfɪˌiːn/ n a white crystalline bitter alkaloid responsible for the stimulant action of tea, coffee, and cocoa: a constituent of many tonics and analgesics. Formula: C₈H₁₀N₄O₂ Etymology: 19th Century: from German Kaffein, from Kaffee coffee
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更新时间：2024/11/11 4:03:10