Definition of mucus in English:


Syllabification: mu·cus
Pronunciation: /ˈmyo͞okəs


  • 1A slimy substance, typically not miscible with water, secreted by mucous membranes and glands for lubrication, protection, etc..
    More example sentences
    • The conjunctiva contains thousands of cells that produce mucus and tiny glands that produce tears.
    • It is spread by contact with the saliva or mucus of an infected person.
    • Physiotherapy helps clear the thick, sticky mucus from the lungs.
  • 1.1A gummy substance found in plants; mucilage.
    More example sentences
    • The tube feet, arranged in groups of three on the pinnules, are coated with mucus that ensnares the prey.
    • This plant secretes mucus from a stalk.
    • Mucus produced by the plant provides temporary and effective protection from petroleum damage.


mid 17th century: from Latin.

More definitions of mucus

Definition of mucus in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day skosh
Pronunciation: skōSH
a small amount; a little