What is the meaning of Earthnut?

Any of various roots, tubers, or pods that grow underground:

  1. A tuber belonging to the species Conopodium majus (syns. Bunium flexuosum, Conopodium denudatum), Bunium bulbocastanum (syn. Carum bulbocastanum), or Apios americana (syn. Apios tuberosa).

    A tuber belonging to the species Conopodium majus (syns. Bunium flexuosum, Conopodium denudatum), Bunium bulbocastanum (syn. Carum bulbocastanum), or Apios americana (syn. Apios tuberosa).

    The dwarf ginseng: Panax trifolius.

    Synonym of peanut (Arachis hypogaea).

    The underground tuber belonging to the genus Tuber.

    Source: wiktionary.org