caffeine

名词 n.
中文释义

英文释义

名词 n.
  1. An alkaloid, C₈H₁₀N₄O₂, found naturally in tea and coffee plants, which acts as a mild stimulant on the central nervous system. uncountable,usually
    — For example, 0.100 grams of caffeine yield by combustion, by weight, 0.180 grammes of carbonic acid.

词形变化

caffeines plural caffein alternative,dated

词源

Borrowed from French caféine, from café (“coffee”), or German Caffein, Kaffein (cp. Coffein, Koffein), from Kaffee (“coffee”) (cp. Kaffe, Koffee, Koffe), or Italian caffè (“coffee”) + -ine.
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