ground·nut /ˈgraʊn(d)ˌnʌt/
 落花生
 Ground·nut n. Bot. (a) The fruit of the Arachis hypogæa (native country uncertain); the peanut; the earthnut. (b) A leguminous, twining plant  (Apios tuberosa), producing clusters of dark purple flowers and having a root tuberous and pleasant to the taste. (c) The dwarf ginseng (Aralia trifolia). [U. S.] --Gray. (d) A European plant of the genus Bunium (B. flexuosum), having an edible root of a globular shape and sweet, aromatic taste; -- called also earthnut, earth chestnut, hawknut, and pignut.
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 groundnut
      n 1: a North American vine with fragrant blossoms and edible
           tubers; important food crop of Native Americans [syn: groundnut
           vine, Indian potato, potato bean, wild bean, Apios
           americana, Apios tuberosa]
      2: nutlike tuber; important food of Native Americans [syn: potato
         bean, wild bean]
      3: pod of the peanut vine containing usually 2 nuts or seeds;
         `groundnut' and `monkey nut' are British terms [syn: peanut,
          earthnut, goober, goober pea, monkey nut]