Caffeine
Pronunciation : Caf*fe"ine
Part of Speech : n.
Etymology : [Cf. F. caf?ine. See Coffee.] (Chem.)
Definition : Defn: 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