Describes the area of the body around the hip and pelvis level (i.e., near the base of the spine). Sacral vertebrae are the bones of the spine in this region, which are fused together to form a bone called the sacrum.
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Sacral: Referring to the sacrum, the 5 vertebral bones situated between the lumbar vertebrae and the coccyx (the lowest segment of the vertebral column). The 5 sacral vertebrae are represented by the symbols S1 through S5. There are correspondingly 5 sacral nerves. The sacral vertebrae are normally fused to form the sacrum. Found on http://www.medterms.com/script/main/art.asp?articlekey=18052