caffeine
n. காப்பி-தேயிலைக் குடிவகைகளிலுள்ள மரவுப்புச் சத்து.
Caf*fe"ine, n. Etym: [Cf. F. caféine. See Coffee.] (Chem.) Defn: A white, bitter, crystallizable substance, obtained from coffee. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana.