caffeine, caffein
(noun) a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
Source: WordNet® 3.1
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
20 December 2024
(verb) commit fraud and steal from one’s employer; “We found out that she had been fiddling for years”
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