Definition of triiodothyronine in English:


Syllabification: tri·i·o·do·thy·ro·nine
Pronunciation: /ˌtrī-īˌōdōˈTHīrəˌnēn, -īˌädō-


  • A thyroid hormone similar to thyroxine but having greater potency.
    More example sentences
    • Human beings require iodine for the production of the thyroid hormones, thyroxine and triiodothyronine.
    • The vertebrate thyroid gland produces two iodinated amino acids, thyroxine and triiodothyronine, which regulate diverse aspects of development, metabolic stimulation and metamorphosis.
    • Thyroid-function test findings might be consistent with the euthyroid sick syndrome, with low triiodothyronine and thyroxine levels and a normal thyroid-stimulating hormone level.

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Word of the day skosh
Pronunciation: skōSH
a small amount; a little