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Note: Do not rely on this information. It is very old.
Sacrum
Sacrum, the bone formed by the union of the five sacral vertebrae and articulating on each side with the two hip-bones forming the posterior part of the pelvis (q.v.).
Sacrum, the bone formed by the union of the five sacral vertebrae and articulating on each side with the two hip-bones forming the posterior part of the pelvis (q.v.).