Sacrum

sacrum /sa·crum/ (sa´krum) [L.] the triangular bone just below the lumbar vertebrae, formed usually by five fused vertebrae and lodged dorsally between the hip bones.

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scimitar sacrum  a congenitally deformed sacrum resembling a scimitar, usually accompanied by other defects such as anorectal or neural anomalies.

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sa·crum (skrm, skrm)

n. pl. sa·cra (skr, skr)

The triangular segment of the spinal column that forms part of the pelvis and closes in the pelvic girdle posteriorly, is formed between the ages of 16 and 25 by the fusion of five originally separate sacral vertebrae, and articulates with the last lumbar vertebra, the coccyx, and the hipbone on either side.

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Sacrum

The triangle-shaped bone located between the fifth lumbar vertebra and the coccyx that consists of five vertebrae fused together. The sacrum joins on each side with the bones of the pelvis.

Mentioned in: Coccyx Injuries, Colon Cancer, Rectal Cancer

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sacrum,

n triangular bone at the base of the spine.

sacrum, posterior,

n condition in which backward rotation of the sacrum and side-bending to the side opposite the rotation have occurred. Resulting tissue changes may be located at the lower pole on the rotated side.

sacrum, posterior translated,

n condition in which the whole sacrum has moved backward between the ilia. Forward motion is restricted, and backward motion is freer.

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sacrum

the triangular-shaped bone between the lumbar and coccygeal vertebrae; formed usually by five fused vertebrae (four in pigs, three in dogs) that are wedged dorsally between the two hip bones. See also Table 10.