A white, bitter, crystallizable substance, present in coffee-and tea. It is identical using the alkaloid theine from tea-leaves, with guaranine from guarana. Its in charge of all of the stimulating effectation of coffee or tea.
An alkaloid, C8H10N4O2, crystallizing in slender, silk-like needles which may have a bitter style, found in coffee-beans.
a bitter alkaloid present in coffee-and tea which responsible for their particular stimulating results