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[hahy-puh-thahy-roi-diz-uh m] /ˌhaɪ pəˈθaɪ rɔɪˌdɪz əm/
noun, Pathology
deficient activity of the thyroid gland.
the condition produced by a deficiency of thyroid secretion, resulting in goiter, myxedema, and, in children, cretinism.
Origin of hypothyroidism
1900-05; hypo- + thyroid + -ism
Related forms
hypothyroid, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hypothyroidism
  • 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.
  • The goal of treatment is to control underlying conditions such as obesity, hypothyroidism, and diabetes.
  • Diabetes, alcoholism, and hypothyroidism make the condition worse.
  • Smoking triples the risk for developing thyroid disease, particularly hyperthyroidism and hypothyroidism.
  • For example, if the primary disorder is hypothyroidism, then amenorrhea will be cured when it is treated with thyroid supplements.
  • The goal of treatment is to control conditions that can raise triglyceride levels such as obesity, hypothyroidism, and diabetes.
  • The more common disorder, hypothyroidism, occurs when the gland fails to produce enough thyroid hormone.
British Dictionary definitions for hypothyroidism


noun (pathol)
insufficient production of thyroid hormones by the thyroid gland
any disorder, such as cretinism or myxoedema, resulting from this
Derived Forms
hypothyroid, noun, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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hypothyroidism in Medicine

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

  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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hypothyroidism in Science
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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