• synonyms


[myoo-kuh s]
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  1. pertaining to, consisting of, or resembling mucus.
  2. containing or secreting mucus.
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Origin of mucous

1640–50; < Latin mūcōsus slimy, mucous, equivalent to mūc(us) snot (see mucus) + -ōsus -ous
Related formsmu·cos·i·ty [myoo-kos-i-tee] /myuˈkɒs ɪ ti/, nounnon·mu·cous, adjectivesub·mu·cous, adjective
Can be confusedmucous mucus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for mucous

viscous, clammy, muddy, glutinous, miry, mucky, mucous, scummy, yukky, close, dank, moist, pasty, slimy, soggy, sticky, sweaty, wet, drizzly, mucid

Examples from the Web for mucous

Contemporary Examples of mucous

Historical Examples of mucous

British Dictionary definitions for mucous


mucose (ˈmjuːkəʊs, -kəʊz)

  1. of, resembling, or secreting mucus
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Derived Formsmucosity (mjuːˈkɒsɪtɪ), noun

Word Origin for mucous

C17: from Latin mūcōsus slimy, from mucus


The noun mucus is often misspelled mucous . Mucous can only be correctly used as an adjective
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

Word Origin and History for mucous


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

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Online Etymology Dictionary, © 2010 Douglas Harper

mucous in Medicine


  1. Containing, producing, or secreting mucus.
  2. Relating to, consisting of, or resembling mucus.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.