Pronunciation: (ground'nut"),[key] —n. 1. Also called wild bean, potato bean. a twining, North American plant, Apios americana (or A. tuberosa), of the legume family, having clusters of fragrant brownish flowers and an edible tuber.
2. any of several other plants having edible underground parts, as the peanut.
3. South Atlantic U.S.peanut.