sacrum

S1A1C3R1U1M3
US, UK/ˈsækɹəm/US, UK/ˈseɪkɹəm/

noun

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.

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UncommonScrabble 10

Meanings

nounsacrum (plural sacra or sacrums)

plural sacra · plural sacrums

  1. anatomyA 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.

    Synonyms: holy bone

Synonyms & antonyms

nounA 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.

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Origin

  1. Ancient Greekἱερὸν ὀστέον
  2. Latinos sacrum“holy bone”
  3. Englishsacrum

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.

Full word history & related roots →

Translations

Arabic عَجُزِ
  • عَجُزِ (ʕajuzi)bone at the base of the spine
Bulgarian кръст, кръстна кост
  • кръст (krăst)bone at the base of the spine
  • кръстна кост (krăstna kost)bone at the base of the spine
Catalan sacre
  • sacrebone at the base of the spine
Chinese Mandarin 骶骨
  • 骶骨 (dǐgǔ)bone at the base of the spine
Czech kost křížová, kříž
  • kost křížovábone at the base of the spine
  • křížbone at the base of the spine
Dutch heiligbeen
  • heiligbeenbone at the base of the spine
Finnish ristiluu
  • ristiluubone at the base of the spine
French sacrum
  • sacrumbone at the base of the spine
German Kreuzbein
  • Kreuzbeinbone at the base of the spine
Greek ιερό οστό
  • ιερό οστό (ieró ostó)bone at the base of the spine
Hebrew עצם העָצֶה
  • עצם העָצֶהbone at the base of the spine
Hungarian keresztcsont
  • keresztcsontbone at the base of the spine
Icelandic spjaldbein, spjaldliðir
  • spjaldbeinbone at the base of the spine
  • spjaldliðirbone at the base of the spine
  • spjaldhryggurbone at the base of the spine
Irish sacram
  • sacrambone at the base of the spine
Italian osso sacro
  • osso sacrobone at the base of the spine
Japanese 仙骨, 薦骨
  • 仙骨 (senkotsu)bone at the base of the spine
  • 薦骨 (senkotsu)bone at the base of the spine
Korean 엉치뼈, 천골
  • 엉치뼈 (eongchippyeo)bone at the base of the spine
  • 천골 (cheon'gol)bone at the base of the spine
Māori poroiwi, tikitona
  • poroiwibone at the base of the spine
  • tikitonabone at the base of the spine
  • tirakibone at the base of the spine
  • tikibone at the base of the spine
Persian استخوان خاجی
  • استخوان خاجیbone at the base of the spine
Polish krzyż, kość krzyżowa
  • krzyżbone at the base of the spine
  • kość krzyżowabone at the base of the spine
Portuguese sacro
  • sacrobone at the base of the spine
Russian кресте́ц
  • кресте́ц (krestéc)bone at the base of the spine
Spanish sacro, hueso sacro
  • sacrobone at the base of the spine
  • hueso sacrobone at the base of the spine
Swedish korsben
  • korsbenbone at the base of the spine
Tagalog kuyukot
  • kuyukotbone at the base of the spine
Turkish sakrum
  • sakrumbone at the base of the spine
Ukrainian крижі
  • крижі (kryži)bone at the base of the spine
Vietnamese xương mông
  • xương môngbone at the base of the spine
Welsh sacrwm, asgwrn y cwman
  • sacrwmbone at the base of the spine
  • asgwrn y cwmanbone at the base of the spine

Rhymes & wordplay

Anagrams

Cite this entry
APA

sacrum. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/sacrum

MLA

“sacrum.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sacrum. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “sacrum,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/sacrum.

Source: sacrum on Wiktionary, CC BY-SA 4.0.