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 Your mouth, nose and eyes have mucous membranes that are potentially receptive to these organisms. Pamela M. Aaltonen, The Conversation, "As CDC warns against Thanksgiving travel, here are a dozen more things you can do to help stop COVID-19," 19 Nov. 2020 After two years of regular emergency room visits and one staph infection, Harden was diagnosed with Stevens-Johnson syndrome (SJS), a rare skin disorder that attacks mucous membranes. Taylyn Washington-harmon,, "What Is Stevens-Johnson Syndrome? This Rare Disorder Can Make Skin Fall Off at the Touch," 24 Sep. 2020 On top of that, a dry, cold climate has the chance to dry out mucous membranes that normally keep us safe from viruses and open us up to a higher risk of catching a bug. Sara Kiley Watson, Popular Science, "Outdoor heaters, video chat, and other hacks for surviving winter with COVID-19," 21 Sep. 2020 Lower levels of humidity in winter tend to dry out and irritate the mucous membranes in our nose and mouth. Peter Krouse, cleveland, "Beware: Fall and winter could be a friend to COVID-19, experts say," 31 Aug. 2020 Symptoms can vary, but sometimes resemble toxic shock syndrome or Kawasaki disease, another rare illness that can cause fever, inflammation of the blood vessels, lymph nodes and mucous membranes in children. From Usa Today Network And Wire Reports, USA TODAY, "Pregnant Panda, Rim of the Pacific, virtual colleges: News from around our 50 states," 20 Aug. 2020 Patients with pneumonic plague — the most serious form of the disease — develop fever, headache, weakness, pneumonia, shortness of breath, chest pain, cough and sometimes bloody or watery mucous. Sophie Lewis, CBS News, "California has its first case of plague in 5 years. How likely are you to catch it?," 20 Aug. 2020 The first is the innate system, which responds quickly to attacks by microscopic invaders with a variety of chemicals like mucous physical barriers like hair and skin, and disease-munching cells called macrophages. Eric Niiler, Wired, "The Anglerfish Deleted Its Immune System to Fuse With Its Mate," 31 July 2020 This lightening of the skin and mucous membranes is usually the only symptom, although in very rare cases, vitiligo can also potentially cause hearing loss and changes in vision, Bhanusali explains. Rebecca Dancer, Allure, "Everything You Need to Know About Vitiligo," 14 Aug. 2020

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

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Time Traveler for mucous

Time Traveler

The first known use of mucous was in 1578

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Statistics for mucous

Last Updated

26 Nov 2020

Cite this Entry

“Mucous.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2020.

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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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