Definitions for: Sacrum


[n] wedge-shaped bone consisting of five fused vertebrae forming the posterior part of the pelvis; its base connects with the lowest lumbar vertebra and its tip with the coccyx



Webster (1913) Definition: Sa"crum, n.; pl. sacra. [NL., fr. L. sacer sacred, os
sacrum the lowest bone of the spine.] (Anat.)
That part of the vertebral column which is directly connected
with, or forms a part of, the pelvis.

Note: It may consist of a single vertebra or of several more
or less consolidated. In man it forms the dorsal, or
posterior, wall of the pelvis, and consists of five
united vertebr[ae], which diminish in size very rapidly
to the posterior extremity, which bears the coccyx.

See Also: bone, hip, os, pelvic arch, pelvic girdle, pelvis, sacral vertebra

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