: a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects
Examples of mucus in a Sentence
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The three stages of a whooping cough infection are the catarrhal phase (inflammation of the mucus membranes) that lasts for the first week or two.
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Mary Walrath-Holdridge, USA Today, 17 Apr. 2025
Children often first show signs of malaise and a fever, followed later by reddish, irritated eyes, a cough and a stuffy nose as the mucus membranes and nasal passages become inflamed.
—Emily Baumgaertner Nunn, New York Times, 4 Apr. 2025
The salt water opens the nasal passages by clearing out thick and dried mucus.
—Angelica Bottaro, Verywell Health, 29 May 2025
His cast includes manatees who use flatulence to control their buoyancy and cave dwelling fungus gnats that create beautiful, illuminated fly-traps from the mucus lit by their bioluminescent butts.
—Tony Maglio, HollywoodReporter, 27 May 2025
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Mary Walrath-Holdridge, USA Today, 17 Apr. 2025
Children often first show signs of malaise and a fever, followed later by reddish, irritated eyes, a cough and a stuffy nose as the mucus membranes and nasal passages become inflamed.
—Emily Baumgaertner Nunn, New York Times, 4 Apr. 2025
The salt water opens the nasal passages by clearing out thick and dried mucus.
—Angelica Bottaro, Verywell Health, 29 May 2025
His cast includes manatees who use flatulence to control their buoyancy and cave dwelling fungus gnats that create beautiful, illuminated fly-traps from the mucus lit by their bioluminescent butts.
—Tony Maglio, HollywoodReporter, 27 May 2025
See All Example Sentences for mucus
Cite this Entry
“Mucus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mucus. Accessed 14 Jun. 2025.
Copy CitationKids Definition
mucus
noun
mu·cus
ˈmyü-kəs 
: a slippery sticky substance produced especially by mucous membranes which it moistens and protects
Medical Definition
mucus
noun
mu·cus
ˈmyü-kəs
: a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects
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