/ Dictionary / Index T thyrotoxicosis: Meaning and Definition of Find definitions for: thy•ro•tox•i•co•sis Pronunciation: (thī"rō-tok"si-kō'sis), [key] — n. Pathol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thyrotoxicosis (Thesaurus) thyrotoxic thyrotrophic Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language