mu·​cous | \ ˈmyü-kəs How to pronounce mucous (audio) \

Definition of mucous

 (Entry 1 of 2)

1 : of, relating to, or resembling mucus
2 : secreting or containing mucus
3 : covered with or as if with mucus : slimy


Definition of mucous (Entry 2 of 2)

nonstandard spelling of

nasal mucous

Examples of mucous in a Sentence

Recent Examples on the Web: Adjective In people of all races, however, skin cancers can also present in places that do not regularly get sun exposure, like the hands or soles of their feet, the mucous membranes (gums, lips) and the nail beds. New York Times, 10 Jan. 2022 Clothes that were covered in nasal mucous, vomit, breast milk, urine. Hari Kunzru, The New York Review of Books, 15 June 2021 While these viruses don’t normally infect humans, birds can shed virus in their saliva, mucous and feces, the CDC says. Adrianna Rodriguez, USA TODAY, 2 June 2021 In those rare cases, saliva, mucous, or feces from infected birds get into a person's eyes, nose, or mouth. Maggie O'neill,, 1 June 2021 When enough snails were caught, the mucous gland that produces the dye had to be extracted from the animal. Mark Woolmer, National Geographic, 24 Sep. 2020 Breast milk carries a immunoglobulin A (IgA), which is found in the mucous membranes such as those lining the nose or throat, and stops the virus locally. Annalisa Merelli, Quartz, 13 Nov. 2021 The virus is transmitted when infected saliva or brain or nervous system tissue enters the body through open wounds or mucous membranes, according to the U.S. Centers for Disease Control and Prevention. Caroline Tien, San Antonio Express-News, 30 Oct. 2021 When anything contaminated with such infectious rat urine comes into contact with your mucous membranes or open wounds, the bacteria can enter your body. Bruce Y. Lee, Forbes, 22 Oct. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mucous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mucous


1578, in the meaning defined at sense 1

History and Etymology for mucous


Latin mucosus, from mucus

Learn More About mucous

Dictionary Entries Near mucous



mucous membrane

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Statistics for mucous

Last Updated

19 Jan 2022

Cite this Entry

“Mucous.” Dictionary, Merriam-Webster, Accessed 28 Jan. 2022.

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More Definitions for mucous


mu·​cous | \ ˈmyü-kəs How to pronounce mucous (audio) \

Kids Definition of mucous

: containing or producing mucus a mucous membrane


mu·​cous | \ ˈmyü-kəs How to pronounce mucous (audio) \

Medical Definition of mucous

1 : covered with or as if with mucus a mucous surface
2 : of, relating to, or resembling mucus a mucous secretion
3 : secreting or containing mucus mucous glands of the intestine

More from Merriam-Webster on mucous

Nglish: Translation of mucous for Spanish Speakers

Britannica English: Translation of mucous for Arabic Speakers


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