earthnut

noun

1. 1

   edible subterranean fungus of the genus Tuber

2. 2

   pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms

3. 3

   a common European plant having edible tubers with the flavor of roasted chestnuts

4. 4

   any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe