Puffball

A kind of ball-shaped fungus (Lycoperdon giganteum, and other species of the same genus) full of dustlike spores when ripe; -- called also bullfist, bullfice, puckfist, puff, and puffin.

any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles

any of various fungi of the family Lycoperdaceae whose round fruiting body discharges a cloud of spores when mature