Main Entry:

thy·rox·ine

Variant(s):

or thy·rox·in \thī-ˈräk-ˌsēn, -sən\

Function:

noun

Etymology:

thyr- + oxy + indole

Date:

1918

: an iodine-containing hormone C₁₅H₁₁I₄NO₄ that is an amino acid produced by the thyroid gland as a product of the cleavage of thyroglobulin, increases metabolic rate, and is used to treat thyroid disorders