"spinal" in the noun sense
1. spinal anesthesia, spinal anaesthesia, spinal
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
"spinal" in the adjective sense
of or relating to the spine or spinal cord
Source: WordNet® (An amazing lexical database of English)
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