endothelium
noun
endothelium is spelled E-N-D-O-T-H-E-L-I-U-M: 11 letters. It appears about once in every 5 million words in written English, the 68,248th most frequent word form (wordfreq, 2021 data). As a noun, endothelium means “A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels” (English Wiktionary, September 2026). The plural of endothelium is endothelia.
How many letters and syllables are in endothelium?
| Letters | 11: E-N-D-O-T-H-E-L-I-U-M |
|---|---|
| In writing | about once in every 5 million words; the 68,248th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is endothelium?
Endothelium appears about once in every 5 million words in written English, the 68,248th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce endothelium?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Wodencafe-endothelium.wav, Wikimedia Commons (author and licence on each file's page).
Forms of endothelium
- endothelia plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does endothelium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Endothelium in Spanish, French, German and Portuguese
In the sense thin layer of cells:
| Language | Words |
|---|---|
| Spanish | endotelio |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does endothelium come from?
From endo- + -thelium, as in epithelium.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).