sa·​crum | \ ˈsa-krəm How to pronounce sacrum (audio) , ˈsā- How to pronounce sacrum (audio) \
plural sacra\ ˈsa-​krə How to pronounce sacrum (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., 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, 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, 30 Oct. 2019 Smith suffered a fractured leg, a broken pelvis and sacrum and damaged internal organs. Karina Elwood,, 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, 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, 26 July 2018 Chris poured water over Lisa’s belly and pressed a sock filled with warm rice on her sacrum. Anndee Hochman,, 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, 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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Cite this Entry

“Sacrum.” Dictionary, Merriam-Webster, Accessed 22 Jun. 2021.

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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 sacrum (audio) , ˈsā-​krə How to pronounce sacrum (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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