noun. A hormone consisting of iodine which is generated by the thyroid gland: the primary thyroid hormone. It assists in regulation of metabolism by managing oxidation rate in cells.

THYROXINE (T4): "Thyroxine levels in the bloodstream are measured for standard thyroid tests."
Cite this page: N., Pam M.S., "THYROXINE (T4)," in, April 29, 2013, (accessed September 27, 2021).