: 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
Steam thins mucus and eases congestion, per the same PMC/NIH trial.
—
Allison Palmer, Sacbee.com, 30 Apr. 2026
Eating bananas can help stomach issues by protecting the stomach lining with more mucus.
—Amber J. Tresca, Verywell Health, 28 Apr. 2026
One type of polyp handles feeding, extending above the sand and secreting a mucus net to capture small prey.
—Samantha Agate, Fort Worth Star-Telegram, 23 Apr. 2026
These polyps extend above the sand and secrete a mucus net to capture small prey.
—Samantha Agate, Charlotte Observer, 23 Apr. 2026
See All Example Sentences for mucus
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Allison Palmer, Sacbee.com, 30 Apr. 2026
Eating bananas can help stomach issues by protecting the stomach lining with more mucus.
—Amber J. Tresca, Verywell Health, 28 Apr. 2026
One type of polyp handles feeding, extending above the sand and secreting a mucus net to capture small prey.
—Samantha Agate, Fort Worth Star-Telegram, 23 Apr. 2026
These polyps extend above the sand and secrete a mucus net to capture small prey.
—Samantha Agate, Charlotte Observer, 23 Apr. 2026
See All Example Sentences for mucus
Cite this Entry
“Mucus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mucus. Accessed 6 May. 2026.
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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