WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / T / tetraiodothyronine tetraiodothyronine noun 18 letters Scrabble 25 WWF 25 Definitions noun hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells tthyroxinthyroxine Look “tetraiodothyronine” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →