Meaning

noun protective secretion of the mucus 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 p

originEtymology tree Proto-Indo-European *(s)mewk-der. Proto-Italic *moukos Latin mūcuslbor. English mucus Learned borrowing from Latin mūcus. Partly displaced Old English slīm, whence modern slime.

Etymology from Wiktionary, CC BY-SA 3.0