triiodothyronine [trahy-ahy-oh-doh-thahy-ruh-neen, -ahy-od-oh-] WORD ORIGIN noun Biochemistry. a thyroid hormone, C15H12I3NO4, similar to thyroxine but several times more potent. Pharmacology. a preparation of this hormone, used in treating hypothyroidism. Abbreviation: T3 Liberaldictionary.com
Origin of triiodothyronine 1950–55; tri- + iodo- + thyronine (perhaps derivative, with -one, of thyroxine) Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for triiodothyronine triiodothyronine noun 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 Origin for triiodothyronine C20: from tri- + iodo- + thyro- + -ine 2 Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012