Theobromine \The`o*bro"mine\, n. (Chem.)
An alkaloidal ureide, {C7H8N4O2}, homologous with and
resembling caffeine, produced artificially, and also
extracted from cacao and chocolate (from {Theobroma Cacao})
as a bitter white crystalline substance; -- called also
{dimethyl xanthine}.
[1913 Webster]