noun · 3 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˈmjuːkəs/
US:Recorded audio is listed in the source snapshot.
rhymes with -uːkəs
homophone: mucous
CMU ARPABET:M Y UW1 K AH0 S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A slippery secretion from the lining of the mucous membranes.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: medicine, physiology, sciences
Examples
The mucus in coryza may vary from runny to viscous.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
Short for vegetable mucus
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, uncountable, usually
Topics: biology, botany, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
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 penetrate the body through the epithelium
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Etymology 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.
Across languages
Translations
118 source translations are retained for this English entry.