/ Dictionary / Index S sympathectomy: Meaning and Definition of Find definitions for: sym•pa•thec•to•my Pronunciation: (sim"pu-thek'tu-mē), [key] — pl. -mies. surgery that interrupts a nerve pathway of the sympathetic or involuntary nervous system. Also calleda like interruption by chemical means. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sympathectomy (Thesaurus) Symons sympathetectomy Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language