a crystalline hormone, CHINO, secreted by the thyroid gland, that influences the rate of general metabolic activity: used medically, esp. to treat hypothyroidism
Origin of triiodothyroninetri- + iodo- + thyr(o)- + -ine
An iodine-containing hormone, C15H12I3NO4, produced by the thyroid gland and similar to but more potent than thyroxine. A synthetic form (liothyronine) is used in the treatment of hypothyroidism.
Origin of triiodothyroninetri- iodo- thyronine an amino acid ( thyr(o)- ) ( -on(e) ) ( -ine 2)
(countable and uncountable, plural triiodothyronines)
tri- +"Ž iodothyronine