(ˈ)ka|fēn also ˈkafēə̇n noun
also caf·fei·na kaˈfēnə; ˌkafēˈēnə, -ˈī-
( -s )
Etymology: German kaffein (now usually koffein, after New Latin coffea ), from kaffee coffee (from French café ) + -in -ine — more at CAF é
: a feebly basic bitter crystalline compound C 8 H 10 N 4 O 2 that occurs in coffee, tea, maté, guarana, and kola nuts, is synthesized by methylation of theobromine, and acts as a stimulant of the central nervous system and as a diuretic; 1,3,7-trimethyl-xanthine