1. triiodothyronine

noun. thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer.


  • thyroid hormone
  • liothyronine


  • iodothyronine (English)
  • iodo- (English)
  • tri- (English)

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Sentences with triiodothyronine

1. Noun, singular or mass
You need to be physically active in order to burn calories after a thyroidectomy since your metabolism may have slowed due to the lack of the thyroxine and triiodothyronine in your body.