Triiodothyronine

**Semantic type:** Amino Acid, Peptide, or Protein|Hormone

**Definition:** A thyroid hormone containing 3 iodine atoms generally synthesized from levothyroxine, and has greater biological activity.

**Synonyms:** - 3,3',5-triiodo-L-thyronine - Liothyronine - T-3 - T3