triiodothyronine
tri·io·do·thy·ro·nine
noun \ˌtrī-ˌī-əd-ō-ˈthī-rə-ˌnēn\Definition of TRIIODOTHYRONINE
: a crystalline iodine-containing hormone C15H12I3NO4 that is an amino acid derived from thyroxine and is used especially in the form of its soluble sodium salt C15H11I3NNaO4 in the treatment of hypothyroidism and metabolic insufficiency—called also liothyronine, T3
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