/ Dictionary / Index S spinal accessory nerve: Meaning and Definition of Find definitions for: spi'nal acces'sory nerve". Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spinal spinal anesthesia 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