thyroxine


thy·rox·ine

noun \thī-ˈräk-ˌsēn, -sən\

Definition of THYROXINE

:  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

Variants of THYROXINE

thy·rox·ine or thy·rox·in \thī-ˈräk-ˌsēn, -sən\

Origin of THYROXINE

thyr- + oxy + indole
First Known Use: 1918

thy·rox·ine

noun    (Medical Dictionary)

Medical Definition of THYROXINE

: 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

Variants of THYROXINE

thy·rox·ine or thy·rox·in \thī-ˈräk-ˌsēn, -sən\

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

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