triiodothyronine
Thyroid Thy"roid, a. [Gr. qyreoeidh`s shield-shaped; qyreo`s a large, oblong shield (from qy`ra a door) + e'i^dos form: cf. F. thyro["i]de, thyr['e]o["i]de.] 1. Shaped like an oblong shield; shield-shaped; as, the thyroid cartilage. [1913 Webster]

2. (Anat.) Of or pertaining to the thyroid body, thyroid cartilage, or thyroid artery; thyroideal. [1913 Webster]

{Thyroid cartilage}. See under {Larynx}.

{Thyroid body}, or {Thyroid gland} (Anat.), an endocrine gland having two lobes, located in the floor of the mouth or the region of the larynx, which secretes two hormones ({thyroxine} and {triiodothyronine}) that regulate the rates of growth and metabloism. In man and most mammals it is a highly vascular organ, partly surrounding the base of the larynx and the upper part of the trachea. Cases of hypothyroidism, where the gland is insufficiently active, can be treated by administration of thyroxine or a combination of thyroxine and triiodothyronine.

{Thyroid dislocation} (Surg.), dislocation of the thigh bone into the thyroid foramen.

{Thyroid foramen}, the obturator foramen. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Triiodothyronine — Général DCI triiodothyronine Nom IUPAC acide (R,S) …   Wikipédia en Français

  • triiodothyronine — triiodothyronine. См. трииодотиронин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • triiodothyronine — [trī ī΄ə dō thī′rə nēn΄] n. [ TRI + IODO + THYR(O) + INE3] a crystalline hormone, C15H12I3NO4, secreted by the thyroid gland, that influences the rate of general metabolic activity: used medically, esp. to treat hypothyroidism …   English World dictionary

  • Triiodothyronine — Chembox new ImageFile = Triiodothyronine.svg ImageSize = 250px ImageFile1 = T3 3D balls.png ImageSize1 = IUPACName = (2S) 2 amino 3 [4 (4 hydroxy 3 iodo phenoxy) 3,5 diiodo phenyl] propanoic acid OtherNames = triiodothyronine T3 3,3 ,5 triiodo L… …   Wikipedia

  • Triïodothyronine — Hormone thyroïdienne Les hormones thyroïdiennes, la thyroxine (= tétraiodothyronine) (T4) et la triiodothyronine (T3), sont des hormones produites par la glande thyroïde à partir d un acide aminé, la tyrosine. La condensation de deux molécules de …   Wikipédia en Français

  • triiodothyronine — tri·io·do·thy·ro·nine .trī .ī əd ō thī rə .nēn n a crystalline iodine containing hormone C15H12I3NO4 that is an amino acid derived from thyroxine and is used esp. in the form of its soluble sodium salt C15H11I3NNaO4 in the treatment of… …   Medical dictionary

  • triiodothyronine — T3; n. the most metabolically active of the thyroid hormones, which is mostly formed in the tissues from thyroxine. A preparation of triiodothyronine (liothyronine sodium) is administered by mouth or injection for treating underactivity of the… …   The new mediacal dictionary

  • 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 • Syn: ↑liothyronine, ↑T • Hypernyms: ↑thyroid… …   Useful english dictionary

  • triiodothyronine — noun Etymology: tri + iod + thyronine an amino acid of which thyroxine is a derivative Date: 1952 an iodine containing hormone C15H12I3NO4 that is an amino acid derived from thyroxine …   New Collegiate Dictionary

  • triiodothyronine — /truy uy oh doh thuy reuh neen , uy od oh /, n. 1. Biochem. a thyroid hormone, C15H12I3NO4, similar to thyroxine but several times more potent. 2. Pharm. a preparation of this hormone, used in treating hypothyroidism. Abbr.: T3 [1950 55; TRI +… …   Universalium

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