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WordReference Random House Learner's Dictionary of American English © 2024mush•room /ˈmʌʃrum, -rʊm/USA pronunciation n. [countable]- Fungia fungus that includes the toadstools and puffballs.
- anything of similar shape or rapid growth, as a mushroom-shaped cloud of smoke from a nuclear explosion.
adj. [before a noun] - of or containing mushrooms.
- resembling a mushroom in shape or rapid growth.
v. [no object] - to spread, grow, or develop quickly:Sales began to mushroom.
- to gather mushrooms:to go mushrooming in the woods.
WordReference Random House Unabridged Dictionary of American English © 2024mush•room (mush′ro̅o̅m, -rŏŏm),USA pronunciation n. - Fungiany of various fleshy fungi including the toadstools, puffballs, coral fungi, morels, etc.
- Fungiany of several edible species, esp. of the family Agaricaceae, as Agaricus campestris (meadow mushroom or field mushroom,) cultivated for food in the U.S.
- anything of similar shape or correspondingly rapid growth.
- a large, mushroom-shaped cloud of smoke or rubble, formed in the atmosphere as a result of an explosion, esp. a nuclear explosion.
adj. - of, consisting of, or containing mushrooms:a mushroom omelet.
- resembling a mushroom in shape or form.
- of rapid growth and often brief duration:mushroom towns of the gold-rush days.
v.i. - to spread, grow, or develop quickly.
- to gather mushrooms.
- to have or assume the shape of a mushroom.
- Middle French mousseron Late Latin mussiriōn-, stem of mussiriō
- alteration (by folk etymology, etymological) of Middle English muscheron, musseroun 1350–1400
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