thy·rox·ine noun \thī-ˈräk-ˌsēn, -sən\
: 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
Origin of THYROXINE
thyr- + ox
y + in
First Known Use: 1918
thy·rox·ine noun (Medical Dictionary)
: an iodine containing hormone C15H11I4NO4 that is an amino acid produced by the thyroid gland as a product of the cleavage of thyroglobulin, increases the metabolic rate, and is used to treat thyroid disorders—called also T4
thyroxine noun (Concise Encyclopedia)
One of the two major hormones (along with the closely related l-triiodothyronine, or T) secreted by the thyroid gland. Its principal function is to stimulate oxygen consumption and thus metabolism in all cells and tissues in the body. Thyroxine is formed by the addition of iodine to the amino acid tyrosine while the latter is in a protein-bound form. Thyroxine secretion is excessive in hyperthyroidism and deficient in hypothyroidism.
Variants of THYROXINE
thyroxine or l-tetraiodothyronine or T4
Learn More About THYROXINE
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