Standard Lemma guide

mucus

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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /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.

Meaning relationships

Synonyms: mucous secretion

Antonyms: none provided

Broader terms: secretion

Narrower terms: phlegm, sputum, snot, booger, leukorrhea, leucorrhea

History

Etymology

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.

  • Albanian: mukozë — slippery secretion
  • Southern Altai: ылјыр (ïlǰïr) — slippery secretion
  • Arabic: مُخَاط (muḵāṭ) — slippery secretion
  • Arabic: نُخَاعَة (nuḵāʕa) — slippery secretion
  • Arabic: مخاط (muḵāṭ) — slippery secretion
  • Arabic: بربور (barbūr) — slippery secretion
  • Arabic: برابير (barabīr) — slippery secretion
  • Armenian: լորձ (lorj) — slippery secretion
  • Old Armenian: մաղաս (małas) — slippery secretion
  • Aromanian: muc — slippery secretion
  • Aromanian: muts — slippery secretion
  • Aromanian: mucã — slippery secretion
  • Asturian: mocu — slippery secretion
  • Azerbaijani: selik — slippery secretion
  • Belarusian: слізь (slizʹ) — slippery secretion
  • Bulgarian: слуз (sluz) — slippery secretion
  • Burmese: အချွဲ (a.hkywai:) — slippery secretion
  • Catalan: moc — slippery secretion
  • Chamicuro: s̈hos̈hochi — slippery secretion
  • Chinese Mandarin: 黏液 (niányè) — slippery secretion
  • Czech: sliz — slippery secretion
  • Danish: slim — slippery secretion
  • Dutch: slijm — slippery secretion
  • Esperanto: muko — slippery secretion
  • Estonian: lima — slippery secretion
  • Faroese: slím — slippery secretion
  • Finnish: lima — slippery secretion
  • French: mucus — slippery secretion
  • French: mucosité — slippery secretion
  • Galician: moco — slippery secretion
  • Galician: limo — slippery secretion
  • Gamilaraay: mirril — slippery secretion
  • Georgian: ლორწო (lorc̣o) — slippery secretion
  • German: Schleim — slippery secretion
  • Greek: βλέννα (vlénna) — slippery secretion
  • Ancient Greek: μύξα (múxa) — slippery secretion
  • Ancient Greek: βλέννα (blénna) — slippery secretion
  • Hawaiian: wale — slippery secretion
  • Hebrew: רִיר (rir) — slippery secretion
  • Hindi: नाक (nāk) — slippery secretion
  • Hungarian: nyálka — slippery secretion
  • Icelandic: slím — slippery secretion
  • Ido: muko — slippery secretion
  • Ilocano: muteg — slippery secretion
  • Italian: muco — slippery secretion
  • Japanese: 粘液 (nen'eki) — slippery secretion
  • Kankanaey: muteg — slippery secretion
  • Kazakh: жалқық (jalqyq) — slippery secretion
  • Kazakh: шырыш (şyryş) — slippery secretion
  • Khmer: សេម្ហៈ (seemhaʼ) — slippery secretion
  • Khmer: សេមហកលា (seemhaʼkaʼlaa) — slippery secretion
  • Khmer: រំអិល (rumʼəl) — slippery secretion
  • Korean: 점액 (jeomaek) — slippery secretion
  • Northern Kurdish: lînc — slippery secretion
  • Northern Kurdish: lîncemade — slippery secretion
  • Kyrgyz: былжыр (bıljır) — slippery secretion
  • Kyrgyz: ылжыр (ıljır) — slippery secretion
  • Lao: ກະເທີ່ (ka thœ̄) — slippery secretion
  • Lao: ເມືອກ (mư̄ak) — slippery secretion
  • Lao: ເສດ (sēt) — slippery secretion
  • Lao: ເສມ (sēm) — slippery secretion
  • Latin: mūcus — slippery secretion
  • Latvian: gļotas — slippery secretion
  • Lithuanian: gleivės — slippery secretion
  • Low German: Sliem — slippery secretion
  • Macedonian: слуз (sluz) — slippery secretion
  • Malay: lendir — slippery secretion
  • Manx: carbeig — slippery secretion
  • Māori: hūpē — slippery secretion
  • Māori: keha — slippery secretion
  • Māori: kea — slippery secretion
  • Māori: hūwareware — slippery secretion
  • Mongolian: салс (sals) — slippery secretion
  • Norwegian Bokmål: slim — slippery secretion
  • Norwegian Nynorsk: slim — slippery secretion
  • Occitan: muc — slippery secretion
  • Pashto: مخاط (moxāt) — slippery secretion
  • Persian: مخاط (moxât) — slippery secretion
  • Persian: خلم (xelm) — slippery secretion
  • Persian: لیزابه (lizābe) — slippery secretion
  • Polish: śluz — slippery secretion
  • Polish: wydzielina — slippery secretion
  • Portuguese: muco — slippery secretion
  • Portuguese: ranho — slippery secretion
  • Punjabi: ਸੀਂਢ (sīṇḍh) — slippery secretion
  • Quechua: ñuti — slippery secretion
  • Quechua: togro — slippery secretion
  • Romanian: muci — slippery secretion
  • Romanian: mucus — slippery secretion
  • Russian: слизь (slizʹ) — slippery secretion
  • Scottish Gaelic: ronn — slippery secretion
  • Serbo-Croatian: слу̑з — slippery secretion
  • Serbo-Croatian: slȗz — slippery secretion
  • Slovak: sliz — slippery secretion
  • Slovene: sluz — slippery secretion
  • Spanish: moco — slippery secretion
  • Swahili: kamasi — slippery secretion
  • Swedish: slem — slippery secretion
  • Tagalog: sipon — slippery secretion
  • Tajik: луоб (luob) — slippery secretion
  • Tarifit: axrur — slippery secretion
  • Thai: มูก (mûuk) — slippery secretion
  • Thai: เมือก (mʉ̂ʉak) — slippery secretion
  • Thai: เสมหะ (sěem-hà) — slippery secretion
  • Turkish: mukus — slippery secretion
  • Turkish: sümük — slippery secretion
  • Ottoman Turkish: سوموك (sümük) — slippery secretion
  • Turkmen: nem — slippery secretion
  • Ukrainian: слиз (slyz) — slippery secretion
  • Urdu: مخاط (muxāt) — slippery secretion
  • Uyghur: شىللىق (shilliq) — slippery secretion
  • Uzbek: shilliq — slippery secretion
  • Venetan: napa — slippery secretion
  • Vietnamese: nước nhầy — slippery secretion
  • Vietnamese: niêm dịch — slippery secretion
  • Vietnamese: chất nhớt — slippery secretion
  • Volapük: slim — slippery secretion
  • Yoruba: ikun — slippery secretion