Sacrum: The large heavy bone at the base of the spine, which is made up of fused sacral vertebrae. The sacrum is located in the vertebral column, between the lumbar vertebrae and the coccyx. It is roughly triangular in shape and makes up the back wall of the pelvis. The female sacrum is wider and less curved than the male.
The name comes from the Latin "os sacrum" (holy bone). Why it was sacred is matter of conjecture.
n. , pl. , sa·cra ( sÄ ' krÉ™, săk ' rÉ™ ). A triangular bone made up of five fused vertebrae and forming the posterior section of the pelvis. [New Latin, from ...
noun, plural sac·ra . Anatomy . a bone resulting from the fusion of two or more vertebrae between the lumbar and the coccygeal regions, in humans being composed ...
The sacral spine or sacrum refers to the large irregular triangular shaped bone made up of the five fused vertebrae below the lumbar region.
Describes and illustrates where the sacrum and coccyx are located within the spinal system.
The sacrum (os sacrum) is a large, triangular bone at the base of the vertebral column and at the upper and back part of the pelvic cavity, where it is inserted like a ...