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Related to Free Triiodothyronine: free thyroxine, FT3, Ft³, Free T4


 (trī′ī-ō′dō-thī′rə-nēn′, -ī-ŏd′ō-)
n. Abbr. T3
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.

[tri- + iodo- + thyronine, an amino acid (thyr(o)- + -on(e) + -ine).]


(Biochemistry) an amino acid hormone that contains iodine and is secreted by the thyroid gland with thyroxine, to which it has a similar action. Formula: C15H12I3NO4
[C20: from tri- + iodo- + thyro- + -ine2]


(ˌtraɪ aɪˌoʊ doʊˈθaɪ rəˌnin, -aɪˌɒd oʊ-)

a thyroid hormone, C15H12I3NO4, similar to thyroxine but more potent: preparations of it used in treating hypothyroidism.
[1950–55; tri- + iod(ine) + -o- + thyronine (perhaps derivative, with -one, of thyroxine)]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.triiodothyronine - 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 - any of several closely related compounds that are produced by the thyroid gland and are active metabolically
References in periodicals archive ?
Abdominal obesity is characterized by higher pulse pressure: Possible role of free triiodothyronine.
Serum thyroxin (T4), free thyroxin (fT4), triiodothyronine (T3), free triiodothyronine (fT3), glucose, beta-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA), triglyceride (TAG), cholesterol, very low density lipoproteins (VLDL-cholesterol), low density lipoproteins (LDL- cholesterol) and high density lipoproteins (HDL-cholesterol) were investigated.
Assessment of thyrotropin, free thyroxine and free triiodothyronine concentrations in healthy children measured by radioisotopic assays.
This seventh edition covers new analytes and adds information on reference intervals for steroids, free thyroxine, and free triiodothyronine.
We investigated the changes in serum levels of total and free testosterone and cortisol, free testosterone-to-free cortisol ratio (FTFCR), insulin-like growth factor-1 (IGF-1), and free triiodothyronine (FT3) and thyroxine (FT4) every 2 weeks for 21 weeks in an elite male weightlifter.
We describe the effects of iopanoic acid on daily levels of free triiodothyronine ([FT.