endocardium
noun
endocardium is spelled E-N-D-O-C-A-R-D-I-U-M: 11 letters. It appears about once in every 50 million words in written English, the 220,118th most frequent word form (wordfreq, 2021 data). As a noun, endocardium means “A thin serous membrane that lines the interior of the heart” (English Wiktionary, September 2026). The plural of endocardium is endocardiums or endocardia.
How many letters and syllables are in endocardium?
| Letters | 11: E-N-D-O-C-A-R-D-I-U-M |
|---|---|
| In writing | about once in every 50 million words; the 220,118th 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 endocardium?
Endocardium appears about once in every 50 million words in written English, the 220,118th 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 endocardium?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-endocardium.wav, Wikimedia Commons (author and licence on each file's page).
Forms of endocardium
- endocardiums plural
- endocardia plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does endocardium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A thin serous membrane that lines the interior of the heart.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Endocardium in Spanish, French, German and Portuguese
In the sense membrane that lines the interior of the heart:
| Language | Words |
|---|---|
| French | endocarde |
| German | Endokard |
| Portuguese | endocárdio |
| Spanish | endocardio |
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.