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mushroom

[ muhsh-room, -room ]
/ ˈmʌʃ rum, -rʊm /
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See synonyms for: mushroom / mushroomed / mushrooming on Thesaurus.com

noun

adjective

verb (used without object)

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Origin of mushroom

First recorded in 1350–1400; alteration (by folk etymology) of Middle English muscheron, musseroun, from Middle French mousseron, ultimately from Late Latin mussiriōn-, stem of mussiriō
mush·room·like, adjectivemush·room·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for mushroom

mushroom
/ (ˈmʌʃruːm, -rʊm) /

noun

  1. the fleshy spore-producing body of any of various basidiomycetous fungi, typically consisting of a cap (pileus) at the end of a stem arising from an underground mycelium. Some species, such as the field mushroom, are edibleCompare pileus, toadstool
  2. (as modifier)mushroom soup
the fungus producing any of these structures
  1. something resembling a mushroom in shape or rapid growth
  2. (as modifier)mushroom expansion

verb (intr)

to grow rapidlydemand mushroomed overnight
to assume a mushroom-like shape
to gather mushrooms
C15: from Old French mousseron, from Late Latin mussiriō, of obscure origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for mushroom

mushroom
[ mŭshrōōm′ ]

Any of various fungi that produce a fleshy fruiting body, which usually consists of a stalk topped by an umbrella-shaped cap. Many mushrooms are basidiomycetes. Some species of mushrooms are edible, though many are poisonous. The term mushroom is often applied to the stalk and cap alone. See more at basidiomycete.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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