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
22 February 2025
(noun) the use of closed-class words instead of inflections: e.g., ‘the father of the bride’ instead of ‘the bride’s father’
The world’s most expensive coffee costs more than US$700 per kilogram. Asian palm civet – a cat-like creature in Indonesia, eats fruits, including select coffee cherries. It excretes partially digested seeds that produce a smooth, less acidic brew of coffee called kopi luwak.
