Definition of earthnut
1
:any of various roots, tubers, or subterranean pods: such as
a
:the tuber of a common southern European plant (Conopodium denudatum) of the family Umbelliferae having the flavor of roasted chestnuts
c
:peanut
d
or less commonly
earthnut pea
:the root of the heath pea
2
:any plant producing earthnuts
3
:truffle
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