*SET-U

English word origin

Etymology of theca

Etymology tree Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰédʰeh₁ti Ancient Greek τίθημι (títhēmi) Ancient Greek θήκη (thḗkē)bor. Latin thēca English theca From New Latin, from Latin thēca, from Ancient Greek θήκη

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

The pollen-producing organ usually found in pairs and forming an anther. · The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle. · The thecal sac: the portion of the dura mater that surrounds the spinal cord and the cauda equina. · The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.

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

Etymology tree Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰédʰeh₁ti Ancient Greek τίθημι (títhēmi) Ancient Greek θήκη (thḗkē)bor. Latin thēca English theca From New Latin, from Latin thēca, from Ancient Greek θήκη (thḗkē, “a case, box, receptacle”), from τίθημι (títhēmi, “put, set, place”). Doublet of tay.

Relationships mentioned by the source

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

This page abbreviates 3 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": "ety",
      "args": {
        "1": "en",
        "2": ":uder",
        "3": "la:thēca",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *dʰeh₁-\nProto-Indo-European *dʰédʰeh₁ti\nAncient Greek τίθημι (títhēmi)\nAncient Greek θήκη (thḗkē)bor.\nLatin thēca\nEnglish theca\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"to put\", \"children\" : [ { \"terms\" : [ { \"id\" : \"be putting\", \"children\" : [ { \"terms\" : [ { \"id\" : \"do\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dʰeh₁-\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dʰédʰeh₁ti\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Ancient Greek\", \"term\" : \"τίθημι\", \"lang\" : \"grc\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"θήκη\", \"status\" : \"ok\", \"lang\" : \"grc\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Latin\", \"term\" : \"thēca\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"uder\" } ], \"lang_name\" : \"English\", \"term\" : \"theca\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"theca\">"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la-new",
        "3": "-"
      },
      "expansion": "New Latin"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "thēca"
      },
      "expansion": "Latin thēca"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "grc",
        "3": "θήκη",
        "4": "",
        "5": "a case, box, receptacle"
      },
      "expansion": "Ancient Greek θήκη (thḗkē, “a case, box, receptacle”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "tay"
      },
      "expansion": "Doublet of tay"
    },
    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":uder",
        "3": "la:thēca",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *dʰeh₁-\nProto-Indo-European *dʰédʰeh₁ti\nAncient Greek τίθημι (títhēmi)\nAncient Greek θήκη (thḗkē)bor.\nLatin thēca\nEnglish theca"
    }
  ],
  "links": [
    [
      "*dʰeh₁-",
      "Reconstruction:Proto-Indo-European/dʰeh₁-#Proto-Indo-European:_do"
    ],
    [
      "*dʰédʰeh₁ti",
      "Reconstruction:Proto-Indo-European/dʰédʰeh₁ti#Proto-Indo-European:_be_putting"
    ],
    [
      "τίθημι",
      "τίθημι#Ancient_Greek:_to_put"
    ],
    [
      "θήκη",
      "θήκη#Ancient_Greek"
    ],
    [
      "thēca",
      "theca#Latin"
    ],
    [
      "thēca",
      "theca#Latin"
    ],
    [
      "θήκη",
      "θήκη#Ancient_Greek"
    ],
    [
      "τίθημι",
      "τίθημι#Ancient_Greek"
    ],
    [
      "tay",
      "tay#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The pollen-producing organ usually found in pairs and forming an anther.",
        "The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle.",
        "The thecal sac: the portion of the dura mater that surrounds the spinal cord and the cauda equina.",
        "The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates."
      ],
      "tags": [],
      "recordId": "4dc0bf0a9c960870ff4b2d1e8aa2298ab5deac828c6eda69db809f9b7df4d5e4",
      "rawRecordSha256": "5276e5913db62cc249dc892e9dea7f4e02750b4d1f2a8f14f0ac4a9c875e3c44",
      "sourceRecordOrdinal": 1792760
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 3,
    "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 theca →

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-dGhlY2E