triiodothyronine

noun
tri·​io·​do·​thy·​ro·​nine | \ ˌtrī-ˌī-ə-dō-ˈthī-rə-ˌnēn How to pronounce triiodothyronine (audio) \

Definition of triiodothyronine

: an iodine-containing hormone C15H12I3NO4 that is an amino acid derived from thyroxine

called also T3

Examples of triiodothyronine in a Sentence

Recent Examples on the Web The hormones that the thyroid gland makes — triiodothyronine, or T3, and thyroxine, or T4 — affect all aspects of your metabolism. Mayo Clinic News Network, chicagotribune.com, 4 Oct. 2019 Your thyroid produces hormones like thyroxine and triiodothyronine, which influence many of your body’s systems, according to the Mayo Clinic. Zahra Barnes, SELF, 16 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'triiodothyronine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of triiodothyronine

1952, in the meaning defined above

History and Etymology for triiodothyronine

tri- + iod- + thyronine an amino acid of which thyroxine is a derivative

Learn More About triiodothyronine

Time Traveler for triiodothyronine

Time Traveler

The first known use of triiodothyronine was in 1952

See more words from the same year

Dictionary Entries Near triiodothyronine

trihydroxy

triiodothyronine

trijet

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Statistics for triiodothyronine

Cite this Entry

“Triiodothyronine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triiodothyronine. Accessed 26 Jan. 2022.

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More Definitions for triiodothyronine

triiodothyronine

noun
tri·​io·​do·​thy·​ro·​nine | \ ˌtrī-ˌī-əd-ō-ˈthī-rə-ˌnēn How to pronounce triiodothyronine (audio) \

Medical 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

More from Merriam-Webster on triiodothyronine

Britannica.com: Encyclopedia article about triiodothyronine

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