ˈgrau̇n(d)ˌnət, -au̇_nət noun
1. : chufa
2. : any of several plants having edible tuberous roots: as
a. : a No. American vine ( Apios tuberosa ) with pinnate leaves and clusters of brownish purple fragrant flowers
b. : dwarf ginseng
c. : harbinger-of-spring
d. chiefly Britain : peanut
3. : the root of a groundnut