sa·​crum | \ˈsa-krəm, ˈsā- \
plural sacra\ ˈsa-​krə , 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

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 His scalp and liver were lacerated, his femur, sacrum and multiple ribs were broken. Andrew Wolfson, The Courier-Journal, "'Bounty hunter' George Rawlings may be the richest Kentuckian you've never heard of," 5 Apr. 2018 Athletes have increased bone density by 2 to 5 percent over a one-year period, and the number of bone stress injuries has decreased, including high-risk injuries like the femoral neck, pelvis, and sacrum. Christine Yu, Outside Online, "The Right Diet Can Help Prevent Running Injuries," 29 Mar. 2018 Ab rotation The human spine is composed of five sections: cervical, thoracic, lumbar, sacrum and coccyx., "5 easy exercises you can do from your chair," 27 Mar. 2018 On May 30, Olivia Newton-John announced she had been diagnosed with breast cancer for the second time in her life—and this time the cancer had metastasized to her sacrum. Megan Friedman, Country Living, "Olivia Newton-John Has an Inspiring Message About Her Cancer Diagnosis," 7 June 2017 The last bones to go, the ilium and sacrum (the big hip bones atop the skeleton) are the heaviest bone structure. Steve Johnson And Phil Geib,, "The dismantling of Sue the T. rex at the Field Museum," 3 Feb. 2018 In the past, surgeons would have considered amputating one of Ms. Secor’s legs, given that the tumor had spread to the bone and nerves of her sacrum and was encroaching on her hip socket. Aili Mcconnon, WSJ, "How 3-D Printing Is Changing Health Care," 12 Sep. 2017

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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The first known use of sacrum was in 1753

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More Definitions for sacrum


sa·​crum | \ˈsak-rəm, ˈsā-krəm \
plural sacra\ ˈsak-​rə , ˈsā-​krə \

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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