*SET-U

English word origin

Etymology of serum

Etymology tree Proto-Indo-European *ser- Proto-Indo-European *sér-o-der. Proto-Italic *serom Latin serumder. English serum From Latin serum (“whey”). Cognates include French sérum, Spanish suero, Italian siere, siero, Po

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

Ellipsis of blood serum. · Blood serum used as a blood product, in the practice of medicine: blood serum from the tissues of immunized animals (human or nonhuman), containing antibodies and used to transfer immunity to another individual (human or nonhuman). · A watery liquid from animal tissue, especially one that moistens the surface of serous membranes or that is exuded by such membranes when they become inflamed, such as in edema or a blister. · The watery portion of certain other animal fluids, such as milk; whey.

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

Etymology tree Proto-Indo-European *ser- Proto-Indo-European *sér-o-der. Proto-Italic *serom Latin serumder. English serum From Latin serum (“whey”). Cognates include French sérum, Spanish suero, Italian siere, siero, Portuguese soro. Doublet of suero.

Relationships mentioned by the source

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

This page abbreviates 1 auxiliary source items. The etymology narrative is not shortened. Omission counts are available in the audit fields below; consult the original for complete auxiliary material.

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":der",
        "3": "la:serum",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *ser-\nProto-Indo-European *sér-o-der.\nProto-Italic *serom\nLatin serumder.\nEnglish serum\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"alt\" : \"*sér-o-\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"id\" : \"flow\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*ser-\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*serom\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"serum\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"English\", \"term\" : \"serum\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"serum\">"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "serum",
        "4": "",
        "5": "whey"
      },
      "expansion": "Latin serum (“whey”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fr",
        "2": "sérum"
      },
      "expansion": "French sérum"
    },
    {
      "name": "cog",
      "args": {
        "1": "es",
        "2": "suero"
      },
      "expansion": "Spanish suero"
    },
    {
      "name": "cog",
      "args": {
        "1": "it",
        "2": "siere"
      },
      "expansion": "Italian siere"
    },
    {
      "name": "cog",
      "args": {
        "1": "pt",
        "2": "soro"
      },
      "expansion": "Portuguese soro"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "suero"
      },
      "expansion": "Doublet of suero"
    },
    {
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      "args": {
        "1": "en",
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      },
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    }
  ],
  "links": [
    [
      "*ser-",
      "Reconstruction:Proto-Indo-European/ser-#Proto-Indo-European:_flow"
    ],
    [
      "*serom",
      "Reconstruction:Proto-Italic/serom"
    ],
    [
      "serum",
      "serum#Latin"
    ],
    [
      "serum",
      "serum#Latin"
    ],
    [
      "sérum",
      "sérum#French"
    ],
    [
      "suero",
      "suero#Spanish"
    ],
    [
      "siere",
      "siere#Italian"
    ],
    [
      "siero",
      "siero#Italian"
    ],
    [
      "soro",
      "soro#Portuguese"
    ],
    [
      "suero",
      "suero#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Ellipsis of blood serum.",
        "Blood serum used as a blood product, in the practice of medicine: blood serum from the tissues of immunized animals (human or nonhuman), containing antibodies and used to transfer immunity to another individual (human or nonhuman).",
        "A watery liquid from animal tissue, especially one that moistens the surface of serous membranes or that is exuded by such membranes when they become inflamed, such as in edema or a blister.",
        "The watery portion of certain other animal fluids, such as milk; whey."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
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        "ellipsis",
        "uncountable"
      ],
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      "rawRecordSha256": "91ff13afff5c27865c1d4943eccf7fa8981207bf49c55c43dc3baaa5f84a9c54",
      "sourceRecordOrdinal": 233252
    }
  ],
  "omittedAuxiliaryFields": {
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  }
}

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 serum →

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-c2VydW0