Wordnet 3.0
NOUN (2)
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]
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]