Spinal

spīn′al, adj. pertaining to the spine or backbone.— n. Spī′na , a spine, the backbone: one of the quills of a spinet: a barrier dividing the Roman hippodrome longitudinally.— adj. Spin′āte , covered with spines or spine-like proce es.— Spinal column , the backbone; Spinal cord , marrow , the main neural axis of every vertebrate.