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Thyroid   Listen
adjective
Thyroid  adj.  
1.
Shaped like an oblong shield; shield-shaped; as, the thyroid cartilage.
2.
(Anat.) Of or pertaining to the thyroid body, thyroid cartilage, or thyroid artery; thyroideal.
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.






Collaborative International Dictionary of English 0.48








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"Thyroid" Quotes from Famous Books



... first at their outer or ventral border, which leaves a deep, narrow groove in the anterior floor of the mouth. As this groove is followed caudad its ventral wall is seen to become much thickened, tg, to form the anlage of the thyroid gland. In the present section the walls of the groove are just fusing, to cut off the cavity of the gland from the dorsal part of the groove. The next section caudad to this shows the thyroid as a round, compact mass of cells, with a very small lumen, still closely fused with the bottom ...
— Development of the Digestive Canal of the American Alligator • Albert M. Reese

... throat. An enlargement of the thyroid glands, said to be frequent in mountainous countries, where river water is drank, which has its source from dissolving snows. This idea is a very ancient one, but perhaps not on that account to be the more depended upon, as authors copy one another. Tumidum guttur quis miratur ...
— Zoonomia, Vol. II - Or, the Laws of Organic Life • Erasmus Darwin

... an alcoholic extract of the thyroid gland upon polyneuritis and the metamorphosis of tadpoles. Am. ...
— The Vitamine Manual • Walter H. Eddy

... at Fa'a,—the octogenarian asked me if I had read of the recent achievements of the scientists who were making the old young. He elaborated on the discoveries and experiments of Professor Leonard Huxley in England with thyroid gland injections, of Voronoff in France with the grafting of interstitial glands of monkeys, and of Eugen Steinach in Austria and Roux in Germany, with germ glands and X-rays. Steinach, especially, ...
— Mystic Isles of the South Seas. • Frederick O'Brien

... islanders received heavy doses of radiation from the weapon's "fallout"—the coral rock, soil, and other debris sucked up in the fireball and made intensively radioactive by the nuclear reaction. One radioactive isotope in the fallout, iodine-131, rapidly built up to serious concentration in the thyroid glands of the victims, particularly young ...
— Worldwide Effects of Nuclear War: Some Perspectives • United States Arms Control and Disarmament Agency

... freeze him with a clamp on his thyroid. It's just as effective as wrapping your fingers around the throat. But Pheola upset the ...
— Vigorish • Gordon Randall Garrett

... health, or it may have been caused by some septic condition of the mouth, induced by the heat and dryness. Some young fellows lost every tooth in their possession in a year. Hair suffered in the same way, but to a lesser extent. Some exhaustion of the thyroid gland may have been at the bottom ...
— In Mesopotamia • Martin Swayne

... that a close acquaintance cannot distinguish the difference between the duplicates. When nature does a trick like this, she does it thoroughly, for it has been noticed—but more especially in the case of twins—the likeness includes the voice, or at least its timbre, the thyroid cartilage and vocal chords following the mysterious law that ...
— The Man Who Lost Himself • H. De Vere Stacpoole

... soundly, however. He was one of those fortunate beings who come into the world with digestive organs and thyroid glands in that condition which—so physiologists tell us—makes for a sanguine temperament. And his course of action, though not decided upon, no longer appeared as a problem; it differed from a business matter in that it could wait. As sufficient ...
— The Crossing • Winston Churchill

... sound-pipe (trachea or windpipe), and consists of a framework of cartilages articulated or jointed with one another so as to permit of movement (vide fig. 4). The cartilages are called by names which indicate their form and shape: (1) shield or thyroid, (2) the ring or cricoid, and (3) a pair of pyramidal or arytenoid cartilages. Besides these there is the epiglottis, which from its situation above the glottis acts more or less as a lid. The shield cartilage is attached by ligaments and muscles to the ...
— The Brain and the Voice in Speech and Song • F. W. Mott

... groove. In the acrania and the ascidiae it consists throughout life of a glandular ciliated groove, which runs down from the mouth in the ventral middle line of the gill-gut, and takes small particles of food to the stomach (Figure 1.101 z). But in the craniota the thyroid gland (thyreoidea) is developed from it, the gland that lies in front of the larynx, and which, when ...
— The Evolution of Man, V.1. • Ernst Haeckel

... established by later researches, that after extirpation of the spleen, an enlargement of various lymphatic glands occurs. The alterations of the thyroid, which have been observed by many authors, cannot be ...
— Histology of the Blood - Normal and Pathological • Paul Ehrlich



Words linked to "Thyroid" :   thyroid gland, inferior thyroid vein, thyroid hormone, ductless gland, thyroid-stimulating hormone, thyroidal



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