| diving goiter | A freely movable goiter that is sometimes above and sometimes below the sternal notch. Synonym: wandering goiter. (05 Mar 2000) |
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| diving | That dives or is used or diving. <zoology> Diving beetle, any beetle of the family Dytiscidae, which habitually lives under water; called also water tiger. Diving bell, a hollow inverted vessel, sometimes bell-shaped, in which men may descend and work under water, respiration being sustained by the compressed air at the top, by fresh air pumped in through a tube from above. Diving dress. See Submarine armor. Diving stone, a kind of jasper. Source: Websters Dictionary (01 Mar 1998) |
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| diving reflex | A reflex by which immersing the face or body in water, especially cold water, tends to cause bradycardia and peripheral vasoconstriction; mean aortic pressure is little affected because the reduction in cardiac output tends to balance the increased peripheral resistance that reduces peripheral blood flow. Although relatively minor in most humans, the changes can be profound in some diving species of animal, e.g., ducks and seals. (05 Mar 2000) |
| aberrant goiter | Enlargement of a supernumerary thyroid gland. Synonym: struma aberrata. (05 Mar 2000) |
| acute goiter | A goiter that develops very rapidly. (05 Mar 2000) |
| adenomatous goiter | An enlargement of the thyroid gland due to the growth of one or more encapsulated adenomas or multiple nonencapsulated colloid nodules within its substance. (05 Mar 2000) |
| Basedow's goiter | Colloid goiter which becomes hyperfunctional after the ingestion of excess iodine, the Jod-Basedow phenomenon. (05 Mar 2000) |
| cabbage goiter | Goiter due to ingestion of cabbage or other goitrogenic foodstuff. (05 Mar 2000) |
| parenchymatous goiter | A form of goiter in which there is a great increase in the follicles with proliferation of the epithelium. Synonym: follicular goiter. (05 Mar 2000) |
| goiter | Enlargement of the thyroid gland. A goiter is not cancerous. A goiter can be associated with normal, elevated (hyperthyroidism) or decreased (hypothyroidism) thyroid hormone levels in the blood. (12 Dec 1998) |
| goiter, diffuse toxic | Graves' disease, the most common cause of hyperthroidism, too much thyroid hormone. (12 Dec 1998) |
| goiter, endemic | Enlargement of the thyroid gland in a significantly large fraction of a population group, generally considered to be due to insufficient iodine in the diet. (12 Dec 1998) |
| goiter, iodide | Just as too little iodine can cause thyroid disease, so may prolonged intake of too much iodine also lead to the development of goiter (swelling of the thyroid gland) and hypothyroidism (abnormally low thyroid activity). Certain foods and medications contain large amounts of iodine. Examples include seaweed; iodine-rich expectorants (such as SSKI and Lugol's solution) used in the treatment of cough, asthma, chronic pulmonary disease; and amiodarone (Cardorone), an iodine-rich medication used in the control of abnormal heart rhythms (cardiac arrhythmias). (12 Dec 1998) |
| goiter, nodular | An enlarged thyroid gland containing circumscribed nodules within its substance. (12 Dec 1998) |
| goiter, substernal | An enlarged thyroid gland where the enlarged gland is situated beneath the sternum. (12 Dec 1998) |
| goiter, toxic multinodular | Condition in which the thyroid gland contains multiple lumps (nodules) that are overactive and produce excess thyroid hormones. This condition is also known as Parry's disease or Plummer's disease. (12 Dec 1998) |