hypothyroidism

American  

[hahy-puh-thahy-roi-diz-uhm] / ˌhaɪ pəˈθaɪ rɔɪˌdɪz əm /

noun

Pathology.

1. deficient activity of the thyroid gland.

2. the condition produced by a deficiency of thyroid secretion, resulting in goiter, myxedema, and, when untreated in children, intellectual disability.

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hypothyroidism British  

/ ˌhaɪpəʊˈθaɪrɔɪˌdɪzəm /

noun

1. insufficient production of thyroid hormones by the thyroid gland

2. any disorder, such as cretinism or myxoedema, resulting from this

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hypothyroidism Scientific  

/ hī′pō-thī′roi-dĭz′əm /

1. 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.

2. Compare hyperthyroidism

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Other Word Forms

Derived Forms

• hypothyroid
  noun
• hypothyroid
  adjective

Etymology

Origin of hypothyroidism

First recorded in 1900–05; hypo- + thyroid + -ism

Example Sentences

At the facility she was denied access to medications for high blood pressure, asthma, peripheral arterial disease, general anxiety and hypothyroidism, she said.

From Los Angeles Times • Jan. 6, 2026

For instance, a mass spectrometer can measure hormone levels in the blood of someone with hypothyroidism.

From Science Daily • Apr. 4, 2024

Feeling unusually cold, along with others symptoms like fatigue, can accompany hypothyroidism.

From Salon • Sep. 11, 2023

Within five weeks Mrs Watson, who has the auto-immune disorders polymyositis and hypothyroidism, was undergoing a colonoscopy.

From BBC • Aug. 3, 2023

The more marked and serious the hypothyroidism, the slower the heart is apt to be.

From Disturbances of the Heart by Osborne, Oliver T. (Oliver Thomas)