mucus

noun mu·cus \ ˈmyü-kəs \
Updated on: 10 Nov 2017

Definition of mucus

:a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects

Recent Examples of mucus from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mucus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of mucus

Latin, nasal mucus; akin to Greek myxa mucus


MUCUS Defined for English Language Learners

mucus

noun

Definition of mucus for English Language Learners

  • : a thick liquid that is produced in some parts of the body (such as the nose and throat)


MUCUS Defined for Kids

mucus

noun mu·cus \ ˈmyü-kəs \

Definition of mucus for Students

:a slippery thick sticky substance that coats, protects, and moistens the linings of body passages and spaces (as of the nose, lungs, and intestines)

Medical Dictionary

mucus

noun mu·cus \ ˈmyü-kəs \

medical Definition of mucus

:a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects

Learn More about mucus


Seen and Heard

What made you want to look up mucus? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to praise usually to excess

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!