earthnut (Noun) — Any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe.
earthnut (Noun) — A common European plant having edible tubers with the flavour of roasted chestnuts.
earthnut (Noun) — Pod of the peanut vine containing usually 2 nuts or seeds.
earthnut (Noun) — Edible subterranean fungus of the genus Tuber.