Guarana . ( Or. ) amer. ; cf. ( Guarani ). 1. f. Am. CEN. , Bull and pair. Shrub in the family Sapindaceae, with sarmentosos stems from three to four meters in length, persistent, alternate leaves and white flowers and fruit capsular ovoid, three divisions, each with its seeds about the size of a pea, black on the outside and yellow almond, after toast used to prepare a febrifuge and refreshing drink. 2. f. Am. CEN. , Bull and pair. Pasta prepared with seeds of this plant, cacao, and tapioca.