spi'nal

i Relating to any spina or spinous proce . 2. Relating to the vertebral column, s. canal, the canal formed by the vertebral arches, in which is the s. cord. s. column, spine, vertebral column, backbone, spina dorsal is, rhachis; the row or column of vertebrae with the intervertebral discs, forming the support of the neck and trunk and enclosing vertebree— the spinal cord; it is composed of 33 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal; the 5 sacral vertebras are fused, forming one bone, the sacrum, and the 4 coccygeal vertebr<e are also fused, forming one bone, the coccjrx. s. cord, medulla spinal is, s. cur'vature, see kyphosis, lordosis, and scoliosis, s. irrita'tion, neurasthenia, or a psychoneurosis, marked especially by paresthesise and pains in the back, with sensitivene to pre ure, a ociated with more or le muscular weakne , constipation, and gastric disturbances, s. marrow, medulla spinal is, b. nerves, the nerves