hypothyroidism

[hahy-puh-thahy-roi-diz-uhm]
noun Pathology.
1.
deficient activity of the thyroid gland.
2.
the condition produced by a deficiency of thyroid secretion, resulting in goiter, myxedema, and, in children, cretinism.

Origin:
1900–05; hypo- + thyroid + -ism

hypothyroid, adjective
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Collins
World English Dictionary
hypothyroidism (ˌhaɪpəʊˈθaɪrɔɪˌdɪzəm)
 
n
1.  insufficient production of thyroid hormones by the thyroid gland
2.  any disorder, such as cretinism or myxoedema, resulting from this
 
hypo'thyroid
 
n, —adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

hypothyroidism hy·po·thy·roid·ism (hī'pō-thī'roi-dĭz'əm)
n.

  1. Insufficient production of thyroid hormones.

  2. A pathological condition resulting from thyroid insufficiency, which may lead to cretinism or myxedema.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
hypothyroidism   (hī'pō-thī'roi-dĭz'əm)  Pronunciation Key 
An abnormality of the thyroid gland characterized by insufficient production of thyroid hormone, which can result in a decreased basal metabolic rate, causing weight gain and fatigue. Compare hyperthyroidism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

hypothyroidism

a deficiency in hormone production by the thyroid gland.

Learn more about hypothyroidism with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Also this center treats hormone imbalance, hypothyroidism and fatigue.
Allowed to progress, severe hypothyroidism can drop the body into a deadly coma.
Hypothyroidism is a condition in which the thyroid gland does not make enough
  thyroid hormone.
Many permanent or temporary conditions can reduce thyroid hormone secretion and
  cause hypothyroidism.
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