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[myoo-kuh s] /ˈmyu kəs/
pertaining to, consisting of, or resembling mucus.
containing or secreting mucus.
Origin of mucous
1640-50; < Latin mūcōsus slimy, mucous, equivalent to mūc(us) snot (see mucus) + -ōsus -ous
Related forms
[myoo-kos-i-tee] /myuˈkɒs ɪ ti/ (Show IPA),
nonmucous, adjective
submucous, adjective
Can be confused
mucous, mucus. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for mucous
  • It damage your mucous membrane of your nose and stay away from opium too.
  • Together they provide a framework for the vocal folds, flaps of mucous membrane attached to muscles either side of the larynx.
  • Rather these bacteria are so common that many of us harbor them in our noses and other mucous membranes.
  • Finally, barracuda also cut down on their drag with a slime they secrete from mucous cells.
  • But even as the germ-laden mucous particles cruise through the air, they do respond to gravity, eventually settling on surfaces.
  • The mucous coat forms part of the genito-urinary mucous membrane.
  • The contiguous surfaces of the tendon and ring are lined by a delicate mucous sheath, and enclosed in a thin fibrous investment.
  • The cells in the mucous alveoli are columnar in shape.
  • The arrangement of the vessels in the mucous membrane is somewhat peculiar.
  • Paleness is an abnormal loss of color from normal skin or mucous membranes.
British Dictionary definitions for mucous


of, resembling, or secreting mucus
Derived Forms
mucosity (mjuːˈkɒsɪtɪ) noun
Usage note
The noun mucus is often misspelled mucous. Mucous can only be correctly used as an adjective
Word Origin
C17: from Latin mūcōsus slimy, from mucus
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
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Word Origin and History for mucous

1640s (replacing mucilaginous), from Latin mucosus "slimy, mucous," from mucus (see mucus). Related: mucosity.

Online Etymology Dictionary, © 2010 Douglas Harper
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mucous in Medicine

mucous mu·cous (myōō'kəs)

  1. Containing, producing, or secreting mucus.

  2. Relating to, consisting of, or resembling mucus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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