• WordNet 3.6
    • n puffball any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles
    • n puffball any of various fungi of the family Lycoperdaceae whose round fruiting body discharges a cloud of spores when mature
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Webster's Revised Unabridged Dictionary
  • Interesting fact: The giant puffball, lycoperdon giganteum, produces 7,000,000,000,000 spores, each of which could grow into a puffball a foot in diameter and collectively cover an area of 280,000 square mile, greater than the size of Texas. Fortunately, only one of the spores actually becomes a puffball, and all the others die.
    • n Puffball (Bot) 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.
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Century Dictionary and Cyclopedia
    • n puffball Any one of various gasteromycetous fungi, especially of the genus Lycoperdon: so called from their habit of puffing or suddenly discharging a cloud of spores when they are shaken or squeezed after the chamber in which the spores develop breaks open. See Fungi, Gasteromycetes, and Lycoperdon; see also fist-ball, foist, fuzzbatl, earthpuff, Bovista (with cut), blind-Harry, blindman's-buff, deil's snuff-box (under deil), devil's snuff-box (under devil), and cut under basidium.
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In literature:

You both belong to the order of what I call puffball politicians.
"The Devil's Paw" by E. Phillips Oppenheim
It is called the puffball in English, but its French name is the vesse-de-loup.
"The Life of the Fly" by J. Henri Fabre
We gathered some puffballs to soak for breakfast and in a clearing I found some blackberry bushes.
"Tish, The Chronicle of Her Escapades and Excursions" by Mary Roberts Rinehart
As he set foot on O'Connell bridge a puffball of smoke plumed up from the parapet.
"Ulysses" by James Joyce
Then he would buy my Colisyum, and I wouldn't sell it for all his puffball lordship might offer.
"The Weavers, Complete" by Gilbert Parker
These are not cheap, as this quantity makes only 12 cakes, but they are light as puffballs.
"Mary at the Farm and Book of Recipes Compiled during Her Visit among the "Pennsylvania Germans"" by Edith M. Thomas
Puffballs, for example, are found on rotting wood or dead twigs or roots.
"Agriculture for Beginners" by Charles William Burkett
It was light as a puffball.
"When Grandmamma Was New" by Marion Harland
Every cloud from a ripe puffball consists of thousands of spores started on the wings of the wind for an unknown journey.
"Seed Dispersal" by William J. Beal
All varieties of puffball with a pure white interior are harmless, if eaten before becoming crumbly and powdery.
"The Home Medical Library, Volume V (of VI)" by Various

In news:

Baby owl 'puffballs' cared for at WSU.
Local anglers Maili Smithson and Bodie Legat with three8 to 12 pound steelhead they caught Friday afternoon on the Chetco side drifting puffballs and roe.
The puffball measured 17 i.
Puffball Jim a testing fool.
Puffball Jim a testing fool.
Owly is a cute puffball of a bird and is almost all eyes.
The chicks arrived five months ago — eight gray, blond, black and tawny puffballs no bigger than the eggs they'd been hatched from a day earlier.
Forager Whitey Hitchcock shares a recipe for turning the latter into "Puffballs Parmesan" on his blog: thefungiforager.com.
Now that's its October, the more common will include Lion's Mane and puffballs.