Definition of Spinal 1. Of or relating to the spine or spinal cord Adjective 2. Anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting an anesthetic beneath the arachnoid membrane that surrounds the spinal cord Noun Synonyms for word "spinal" Semanticaly linked words with "spinal" Hyponims for word "spinal" Lexical Analysis for "spinal" spine a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin the series of vertebrae forming the axis of the skeleton and protecting the spinal cord spine the series of vertebrae forming the axis of the skeleton and protecting the spinal cord has derived form spine etymology cerebrospinal etymology infraspinal etymology interspinal etymology nonspinal etymology opticospinal etymology paraspinal etymology prespinal etymology sacrospinal etymology spinally etymology supraspinal etymological origin of spīnālis [Latin]