CAFFEINE

caffeine, caffein

(noun) a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects

Source: WordNet® 3.1


Etymology

Noun

caffeine (usually uncountable, plural caffeines)

An alkaloid, C8H10N4O2, found naturally in tea and coffee plants which acts as a mild stimulant on the central nervous system. [from 1830]

Coordinate terms: guaranine, mateine, theine

Source: Wiktionary


Caf*fe"ine, n. Etym: [Cf. F. caféine. See Coffee.] (Chem.)

Definition: A white, bitter, crystallizable substance, obtained from coffee. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana.

Source: Webster’s Unabridged Dictionary 1913 Edition



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