: 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
Recent Examples on the Web
Patients develop fever, headache, weakness and pneumonia with shortness of breath, chest pain, cough and sometimes bloody or watery mucus.
—
Saleen Martin, USA Today, 11 July 2025
This reaction breaks through thick mucus and destroys harmful bacteria at the infection site.
—Kurt Knutsson, FOXNews.com, 7 July 2025
Furthermore, the researchers say that there was no significant damage to healthy mucus or nasal cells, even after 20 minutes of light activation.
—New Atlas, 30 June 2025
Mollusk mucus is known to be five times more viscous than water.
—ArsTechnica, 28 June 2025
See All Example Sentences for mucus
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Saleen Martin, USA Today, 11 July 2025
This reaction breaks through thick mucus and destroys harmful bacteria at the infection site.
—Kurt Knutsson, FOXNews.com, 7 July 2025
Furthermore, the researchers say that there was no significant damage to healthy mucus or nasal cells, even after 20 minutes of light activation.
—New Atlas, 30 June 2025
Mollusk mucus is known to be five times more viscous than water.
—ArsTechnica, 28 June 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 20 Jul. 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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