: 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 gastrointestinal tract is lined with a protective layer of mucus that plays a crucial role in trapping and expelling pathogens and other foreign particles.
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Claire Bugos, Verywell Health, 7 Mar. 2025
The Vatican said the mucus was his body’s reaction to the original pneumonia infection and not a new infection, given laboratory tests don’t indicate any new bacteria.
—Nicole Winfield, Chicago Tribune, 3 Mar. 2025
The product works by flushing out mucus, dust particles, pollen, and other debris in the nasal passage.2
Why Was the Nasal Wash Recalled?
—Jenna Anderson, Health, 27 Feb. 2025
Thiols are also present in mucus proteins, called mucins, so the team wanted to see if the two could link up.
—Michael Irving, New Atlas, 26 Feb. 2025
See All Example Sentences for mucus
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Claire Bugos, Verywell Health, 7 Mar. 2025
The Vatican said the mucus was his body’s reaction to the original pneumonia infection and not a new infection, given laboratory tests don’t indicate any new bacteria.
—Nicole Winfield, Chicago Tribune, 3 Mar. 2025
The product works by flushing out mucus, dust particles, pollen, and other debris in the nasal passage.2
Why Was the Nasal Wash Recalled?
—Jenna Anderson, Health, 27 Feb. 2025
Thiols are also present in mucus proteins, called mucins, so the team wanted to see if the two could link up.
—Michael Irving, New Atlas, 26 Feb. 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 13 Apr. 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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