WordNet (r) 3.0 (2006):

false truffle
    n 1: any of various fungi of the family Rhizopogonaceae having
         subterranean fruiting bodies similar to the truffle
    2: any of various fungi of the genus Scleroderma having hard-
       skinned subterranean fruiting bodies resembling truffles
       [syn: earthball, false truffle, puffball, hard-skinned
       puffball]