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 Young Shaylie had suffered a broken jaw in two places, a broken neck in two places, a broken femur, a fractured sacrum and a brain injury. Fox News, 14 July 2022 My sacrum attachment and / or glute max area got very sore towards the end of workout. Outside Online, 28 Oct. 2019 The protagonist grows a scruff of coarse hair above her sacrum and sniffs out bunnies in her yard; playtime with her son involves licking and biting. Hillary Kelly, Vulture, 15 Dec. 2021 O’Donnell suffered a broken sacrum, the triangular bone between the hip bones, a broken right foot and too many fractures of his pelvic region for the doctors to even count, his wife said. Jesse Leavenworth,, 5 Oct. 2021 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 See More

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.

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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Last Updated

17 Jul 2022

Cite this Entry

“Sacrum.” Dictionary, Merriam-Webster, Accessed 14 Aug. 2022.

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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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