*SET-U

English word origin

Etymology of mucus

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.

1 source sectionExtended source reportWiktionary original ↗
In this entry · 1 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Unnumbered source etymology

Original entry ↗
noun

A slippery secretion from the lining of the mucous membranes. · Short for vegetable mucus

Selected source glosses provide context, not a complete modern definition inventory

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.

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

  • Learned-borrowing mentionmūcusla
  • Inherited-form mentionslīmang
Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":lbor",
        "3": "la:mūcus",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *(s)mewk-der.\nProto-Italic *moukos\nLatin mūcuslbor.\nEnglish mucus\n[Appendix:Glossary#learned_borrowing|Learned borrowing]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*(s)mewk-\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*moukos\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"mūcus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"lbor\" } ], \"lang_name\" : \"English\", \"term\" : \"mucus\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"mucus\">"
    },
    {
      "name": "lbor",
      "args": {
        "1": "en",
        "2": "la",
        "3": "mūcus"
      },
      "expansion": "Learned borrowing from Latin mūcus"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "slīm"
      },
      "expansion": "Old English slīm"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":lbor",
        "3": "la:mūcus",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *(s)mewk-der.\nProto-Italic *moukos\nLatin mūcuslbor.\nEnglish mucus"
    }
  ],
  "links": [
    [
      "*(s)mewk-",
      "Reconstruction:Proto-Indo-European/(s)mewk-"
    ],
    [
      "*moukos",
      "Reconstruction:Proto-Italic/moukos"
    ],
    [
      "mūcus",
      "mucus#Latin"
    ],
    [
      "mūcus",
      "mucus#Latin"
    ],
    [
      "slīm",
      "slim#Old_English"
    ],
    [
      "slime",
      "slime#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A slippery secretion from the lining of the mucous membranes.",
        "Short for vegetable mucus"
      ],
      "tags": [
        "uncountable",
        "usually",
        "abbreviation",
        "alt-of"
      ],
      "recordId": "d7aba157ac1fd6a7d19bce536c5119b7eac4f0809b27cf7a959922a893a5b9d7",
      "rawRecordSha256": "1745f3de328df6f90e47c5aa5ea7354b95ed9154845febbaa621bc52d1a5aa9e",
      "sourceRecordOrdinal": 183893
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for mucus →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger
Machine-source provenance
Source SHA-256
5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run
73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID
w-bXVjdXM