Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

mucus

play
noun mu·cus \ˈmyü-kəs\

Simple Definition of mucus

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

Full Definition of mucus

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

Origin of mucus

Latin, nasal mucus; akin to Greek myxa mucus


First Known Use: 1597


MUCUS Defined for Kids

mucus

play
noun mu·cus \ˈmyü-kəs\

Definition of mucus

  1. :  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

play
noun mu·cus \ˈmyü-kəs\

Medical Definition of mucus

  1. :  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).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez duvet kittly-benders spindrift
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ