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mucus

[myoo-kuh s] /ˈmyu kəs/
noun
1.
a viscous, slimy mixture of mucins, water, electrolytes, epithelial cells, and leukocytes that is secreted by glands lining the nasal, esophageal, and other body cavities and serves primarily to protect and lubricate surfaces.
Origin of mucus
1655-1665
1655-65; < Latin mūcus snot; akin to Greek myktḗr nose, mýxa slime
Can be confused
mucous, mucus.
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for mucus

mucus

/ˈmjuːkəs/
noun
1.
the slimy protective secretion of the mucous membranes, consisting mainly of mucin
Word Origin
C17: from Latin: nasal secretions; compare mungere to blow the nose; related to Greek muxa mucus, muktēr nose
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for mucus
n.

1660s (replacing Middle English mucilage), from Latin mucus "slime, mold, mucus of the nose, snot," from PIE root *meug- "slippery, slimy," with derivatives referring to wet or slimy substances or conditions (cf. Latin emungere "to sneeze out, blow one's nose," mucere "be moldy or musty," Greek myssesthai "to blow the nose," myxa "mucus," mykes "fungus," Sanskrit muncati "he releases"). Old English had horh, which may be imitative.

Online Etymology Dictionary, © 2010 Douglas Harper
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mucus in Medicine

mucus mu·cus (myōō'kəs)
n.
The viscous slippery substance that consists chiefly of mucin, water, cells, and inorganic salts and that is secreted as a protective lubricant coating by the cells and glands of the mucous membranes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mucus in Science
mucus
  (my'kəs)   
The slimy, viscous substance secreted as a protective lubricant by mucous membranes. Mucus is composed chiefly of large glycoproteins called mucins and inorganic salts suspended in water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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mucus in Culture

mucus definition


A slippery and somewhat sticky fluid secreted by the glands in mucous membranes. Mucus lubricates and protects the mucous membranes.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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9
13
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