toadstool definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a number of fleshy, umbrella-shaped, basidiomycetous fungi; mushroom; esp., in popular usage, any poisonous mushroom
Origin: Middle English todestole: see toad and amp; stool
toadstool definition by American Heritage Dictionary
An inedible or poisonous fungus with an umbrella-shaped fruiting body.