Standard Lemma guide

endothelium

noun · 2 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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  • rhymes with -iːliəm

1

noun

Meaning 1

A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: epithelium, epithelial tissue

History

Etymology

From endo- + -thelium, as in epithelium.

Across languages

Translations

11 source translations are retained for this English entry.

  • Arabic: بِطَانَة (biṭāna) — thin layer of cells
  • Bulgarian: ендотел (endotel) — thin layer of cells
  • Catalan: endoteli — thin layer of cells
  • Chinese Mandarin: 內皮 /内皮 (nèipí) — thin layer of cells
  • Finnish: endoteeli — thin layer of cells
  • Greek: ενδοθήλιο (endothílio) — thin layer of cells
  • Ido: endotelio — thin layer of cells
  • Italian: endotelio — thin layer of cells
  • Polish: śródbłonek — thin layer of cells
  • Spanish: endotelio — thin layer of cells
  • Turkish: endotel — thin layer of cells