Noun
1. any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe
2. a common European plant having edible tubers with the flavor of roasted chestnuts
3. pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms
4. edible subterranean fungus of the genus Tuber