sacrum
/ˈsækɹəm/noun
sacrum is spelled S-A-C-R-U-M: 6 letters. It appears about once in every 4 million words in written English, the 62,894th most frequent word form (wordfreq, 2021 data). As a noun, sacrum means “A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood” (English Wiktionary, September 2026). The plural of sacrum is sacra or sacrums.
How many letters and syllables are in sacrum?
| Letters | 6: S-A-C-R-U-M |
|---|---|
| In writing | about once in every 4 million words; the 62,894th 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 sacrum?
Sacrum appears about once in every 4 million words in written English, the 62,894th 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 sacrum?
- US /ˈsækɹəm/
- US /ˈseɪkɹəm/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-sacrum.wav, LL-Q1860_(eng)-Wodencafe-sacrum.wav, Wikimedia Commons (author and licence on each file's page).
Forms of sacrum
- sacra plural
- sacrums plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does sacrum mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Sacrum in Spanish, French, German and Portuguese
In the sense bone at the base of the spine:
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 sacrum come from?
From Latin os sacrum (“holy bone”), a calque of Ancient Greek ἱερὸν ὀστέον (hieròn ostéon). Apparently so called either because the sacrum was the part of the animal offered in sacrifice or because of a putative belief that it is where a person's soul resides. A third explanation is that the term is a translation of Ancient Greek ἱερόν (hierón), which has two meanings: “holy, sacred”, and “big” – big being a more appropriate description of the sacrum – but compare.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).