noun (n)

• any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe(noun.plant)

  Synonym:
  earth-ball, earthnut
  

  source: wordnet30
• edible subterranean fungus of the genus Tuber(noun.food)

  Synonym:
  earthnut
  

  source: wordnet30
• creamy chocolate candy(noun.food)

  Synonym:
  chocolate truffle
  

  source: wordnet30
• Any one of several kinds of roundish, subterranean fungi, usually of a blackish color. The French truffle (Tuber melanosporum) and the English truffle (T. æstivum) are much esteemed as articles of food.(noun)

  source: webster1913