The DICT Development Group
2 definitions found
From The Collaborative International Dictionary of English v.0.48 :
caffein \caf*fe"in\, Caffeine \Caf*fe"ine\, n. [Cf. F.
caf['e]ine. See Coffee.] (Chem.)
A white, bitter, crystallizable substance, found in coffee
and tea. It is identical with the alkaloid theine from tea
leaves, and with guaranine from guarana. It is responsible
for most of the stimulating effect of coffee or tea.
[1913 Webster + WordNet 1.5]
From WordNet (r) 3.0 (2006) :
n 1: a bitter alkaloid found in coffee and tea that is
responsible for their stimulating effects [syn: caffeine,
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