/ Dictionary / Index T thyroidectomy: Meaning and Definition of Find definitions for: thy•roid•ec•to•my Pronunciation: (thī"roi-dek'tu-mē), [key] — pl. -mies. excision of all or a part of the thyroid gland. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thyroidectomy (Thesaurus) thyroid thyroid gland Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language