/ Dictionary / Index A adenoidectomy: Meaning and Definition of Find definitions for: ad•e•noid•ec•to•my Pronunciation: (ad"n-oi-dek'tu-mē), [key] — pl. -mies. surgical removal of the adenoids. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adenoidectomy (Thesaurus) adenoidal adenoiditis Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language