pignut

noun

1. the nut of the brown hickory, Carya glabra, of North America.
2. the tree itself.
3. the tuber of a European plant, Conopodium denudatum.

noun

1. Also called: hognut
   1. the bitter nut of any of several North American hickory trees, esp Carya glabra (brown hickory)
   2. any of the trees bearing such a nut
2. another name for earthnut