sacrum

noun

sa·​crum ˈsa-krəm  ˈsā- 

plural sacra ˈsa-krə  ˈsā- 

: 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

O’Donnell’s injuries were severe including a broken right foot, four fractures to his pelvic bone and a shattered sacrum, a small bone located near the bottom of the spine. —Stephen Underwood, Hartford Courant, 1 Nov. 2024

Lift your hips off the ground and place a block underneath your sacrum, the widest, boniest part of your pelvis. —Cory Martin, Verywell Health, 16 Oct. 2024

The Connection Between Tailbone Pain and Sacroiliac Joint Pain The two sacroiliac joints (one on either side of your lower spine) connect your sacrum (the bone that connects your spine to your pelvis) to your hip bone. —Anna Giorgi, Verywell Health, 12 July 2024

Your tailbone is attached to the bottom of your sacrum. —Anna Giorgi, Verywell Health, 12 July 2024

Word History

Etymology

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

First Known Use

1753, in the meaning defined above

Kids Definition

sacrum

noun

sa·​crum ˈsak-rəm  ˈsā-krəm 

plural sacra ˈsak-rə 

ˈsā-krə

: a triangular bone at the base of the spinal column that connects with or forms a part of the pelvis and in human beings consists of five united vertebrae

Medical Definition

sacrum

noun

sa·​crum ˈsak-rəm  ˈsā-krəm 

plural sacra ˈsak-rə  ˈsā-krə 

: 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