/ Dictionary / Index S septectomy: Meaning and Definition of Find definitions for: sep•tec•to•my Pronunciation: (sep-tek'tu-mē), [key] — pl. -mies. excision of part or all of a septum, esp. the nasal septum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: septectomy (Thesaurus) septavalent September Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language