Truffle

from WordNet (r) 3.0 (2006)

truffle
    n 1: any of various highly prized edible subterranean fungi of
         the genus Tuber; grow naturally in southwestern Europe
         [syn: {truffle}, {earthnut}, {earth-ball}]
    2: edible subterranean fungus of the genus Tuber [syn:
       {truffle}, {earthnut}]
    3: creamy chocolate candy [syn: {truffle}, {chocolate truffle}]

from The Collaborative International Dictionary of English v.0.48

Truffle \Truf"fle\ (?; 277), n. [OF. trufle, F. truffe; akin to
   Sp. trufa, tartufo; of uncertain origin; perhaps from L.
   tuber a tumor, knob, truffle. Cf. {Tuber}, {Trifle}.]
   Any one of several kinds of roundish, subterranean fungi,
   usually of a blackish color. The French truffle ({Tuber
   melanosporum}) and the English truffle ({Tuber aestivum}) are
   much esteemed as articles of food.
   [1913 Webster]

   {Truffle worm} (Zool.), the larva of a fly of the genus
      {Leiodes}, injurious to truffles.
      [1913 Webster]