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
Origin of triiodothyronine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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