Mucus vs. Mucous — What's the Difference?

Mucus ( MEW-kəs) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells.

Relating to, producing, covered with, or of the nature of mucus.

The viscous, slippery substance that consists chiefly of mucin, water, cells, and inorganic salts and is secreted as a protective lubricant coating by cells and glands of the mucous membranes.

Containing, producing, or secreting mucus

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

Relating to, consisting of, or resembling mucus

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.

Pertaining to mucus

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

Having the qualities of mucus

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

Of, pertaining to, or resembling, mucus; slimy, ropy, or stringy, and lubricous; as, a mucous substance.

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

Secreting a slimy or mucigenous substance; as, the mucous membrane.

Of or secreting or covered with or resembling mucus;