liothyronine Liothrix • Liotrichi · · · Info · Definitions · Synonyms · Characters · · liothyronine · · Text Latin · · Script 12 · · Length 4 · · Syllables Definitions · · · (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. Synonyms: triiodothyronine, T. · · Noun Definition 1 Synonyms · · · triiodothyronine · · Synonym 1 t · · Synonym 2 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079