Definition of Hormone, thyroxine
Hormone, thyroxine: A chemical substance made by the thyroid gland The thyroid gland uses iodine to make thyroid hormones. Thyroxine (T4), one of the most important thyroid hormones, has four iodine molecules attached to its molecular structure.
Last Editorial Review: 6/9/2016
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?