triiodothyronine

[ trahy-ahy-oh-doh-thahy-ruh-neen, -ahy-od-oh- ]

noun

1. Biochemistry. a thyroid hormone, C 15 H 12 I 3 NO 4 , similar to thyroxine but several times more potent.
2. Pharmacology. a preparation of this hormone, used in treating hypothyroidism. : T 3

triiodothyronine

/ ˌtraɪaɪˌəʊdəʊˈθaɪrəˌniːn /

noun

1. an amino acid hormone that contains iodine and is secreted by the thyroid gland with thyroxine, to which it has a similar action. Formula: C 15 H 12 I 3 NO 4

Word History and Origins

Origin of triiodothyronine¹

1950–55; tri- + iodo- + thyronine (perhaps derivative, with -one, of thyroxine )

Word History and Origins

Origin of triiodothyronine¹

C20: from tri- + iodo- + thyro- + -ine ²