MUCUS

mucus, mucous secretion

(noun) protective secretion of the mucous membranes; in the gut it lubricates the passage of food and protects the epithelial cells; in the nose and throat and lungs it can make it difficult for bacteria to penetrate the body through the epithelium

Source: WordNet® 3.1

Etymology

Noun

mucus (usually uncountable, plural mucuses)

(physiology) A slippery secretion from the lining of the mucous membranes.

Usage notes

Do not confuse mucous (adjective) with mucus (noun).

Hyponyms

• phlegm

• rheum

Anagrams

• CUSUM

Source: Wiktionary

Mu"cus, n. Etym: [L. mucus, muccus; cf. mucere 8be moldy or musty, Gr. muc to release. Cf. Match for striking fire, Moist, Mucilage.]

1. (Physiol.)

Definition: A viscid fluid secreted by mucous membranes, which it serves to moisten and protect. It covers the lining membranes of all the cavities which open externally, such as those of the mouth, nose, lungs, intestinal canal, urinary passages, etc.

2. (Physiol.)

Definition: Any other animal fluid of a viscid quality, as the synovial fluid, which lubricates the cavities of the joints; -- improperly so used.

3. (Bot.)

Definition: A gelatinous or slimy substance found in certain algæ and other plants.

Source: Webster’s Unabridged Dictionary 1913 Edition