sa·​crum | \ ˈsa-krəm How to pronounce sacrum (audio) , ˈsā- How to pronounce sacrum (audio) \
plural sacra\ ˈsa-​krə How to pronounce sacra (audio) , ˈsā-​ \

Definition of sacrum

: the part of the spinal column that is directly connected with or forms a part of the pelvis and in humans consists of five fused vertebrae

Examples of sacrum in a Sentence

Recent Examples on the Web The sacrum consists of two vertebrae that form a large triangular bone at the bottom of the spine, acting as a wedge between the hip bones., "With Henry not 100 percent, the Titans made the strategic decision to rest Henry — and still benefitted when the Steelers’ loss to the Jets put the Titans in position Sunday to clinch a playoff berth with a win against the Texans.," 27 Dec. 2019 The tight fusion of vertebrae at the hip-spine connection—called the sacrum—also became unfused and more flexible. Riley Black, Smithsonian, "Ancient Whale Fossil Helps Detail How the Mammals Took From Land to Sea," 11 Dec. 2019 The pelvis, too, has a tendency to be shown warped and curvy as if combined with the sacrum into a single semi-circular unit. Jack Hartnell, Time, "The Medieval History Behind Our Halloween Fascination With Skeletons," 30 Oct. 2019 Smith suffered a fractured leg, a broken pelvis and sacrum and damaged internal organs. Karina Elwood,, "13 years after man lost leg in crash with Orange County van, state approves $750K payout: ‘Some light at the end of the tunnel now’," 7 June 2019 The cancer, already at Stage 4, had metastasized to her sacrum, a bone at the base of her spine. Marie Milano, Country Living, "Who Is Olivia Newton-John's Daughter, Chloe Lattanzi?," 16 Feb. 2019 According to Owen, the sacroiliac joints just beneath your spine that connect to the sacrum are similarly vulnerable, along with your wing-like hip bones. Holly Lebowitz Rossi, Good Housekeeping, "What to Do Right After You Throw Out Your Back," 26 July 2018 Chris poured water over Lisa’s belly and pressed a sock filled with warm rice on her sacrum. Anndee Hochman,, "The Parent Trip: Lisa and Christopher Browne of West Mount Airy," 1 May 2018 Cancer spread through her body like the roots of an aggressive weed, invading her ribs, her lymph nodes, liver, the bone of her left arm, the bone of her sacrum. Kristen Jordan Shamus, Detroit Free Press, "Livingston mom battles breast cancer with experimental treatments to help other patients," 22 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sacrum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sacrum

1753, in the meaning defined above

History and Etymology for sacrum

New Latin, from Late Latin os sacrum last bone of the spine, literally, holy bone, translation of Greek hieron osteon

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Time Traveler for sacrum

Time Traveler

The first known use of sacrum was in 1753

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Cite this Entry

“Sacrum.” Dictionary, Merriam-Webster, Accessed 12 Jul. 2020.

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More Definitions for sacrum


sa·​crum | \ ˈsak-rəm How to pronounce sacrum (audio) , ˈsā-krəm How to pronounce sacrum (audio) \
plural sacra\ ˈsak-​rə How to pronounce sacra (audio) , ˈsā-​krə How to pronounce sacra (audio) \

Medical Definition of sacrum

: the part of the spinal column that is directly connected with or forms a part of the pelvis by articulation with the ilia and that in humans forms the dorsal wall of the pelvis and consists of five fused vertebrae diminishing in size to the apex at the lower end which bears the coccyx

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