caffeine means an alkaloid, C₈H₁₀N₄O₂, found naturally in tea and coffee plants, which acts as a mild stimulant on the central nervous system. Lexicurio rates it Distinctive — a strength score of 68 out of 100.
caffeine is pronounced /ˈkæfiːn/.
Etymology
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.
noun
- An alkaloid, C₈H₁₀N₄O₂, found naturally in tea and coffee plants, which acts as a mild stimulant on the central nervous system.“For example, 0.100 grams of caffeine yield by combustion, by weight, 0.180 grammes of carbonic acid.”