/ Dictionary / Index S spinal anesthesia: Meaning and Definition of Find definitions for: spi'nal anesthe'sia Pronunciation: [key] — Med. Med. interruption of conduction of nerve impulses by the injection of an anesthetic into the spinal canal that reduces sensitivity to pain without loss of consciousness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spinal accessory nerve spinal block Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language