"puffballs" in the noun sense
1. puffball, true puffball
any of various fungi of the family Lycoperdaceae whose round fruiting body discharges a cloud of spores when mature
2. earthball, false truffle, puffball, hard-skinned puffball
any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles
Source: WordNet® (An amazing lexical database of English)
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