hypothyroidism

noun

hy·​po·​thy·​roid·​ism ˌhī-pō-ˈthī-ˌrȯi-ˌdi-zəm How to pronounce hypothyroidism (audio)
: deficient activity of the thyroid gland
also : a resultant bodily condition characterized by lowered metabolic rate and general loss of vigor

Examples of hypothyroidism in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Autoimmune diseases: Early menopause may be related to lupus or autoimmune hypothyroidism. Mónica Heras, Vogue, 12 May 2025 However, many people have hypothyroidism due to Hashimoto's disease. Merve Ceylan, Health, 25 Jan. 2025 According to the National Institute of Diabetes and Digestive and Kidney Diseases, Hashimoto's disease is an autoimmune disorder that can cause hypothyroidism, or an underactive thyroid. EW.com, 9 May 2025 While immunotherapies also come with side effects—including fatigue, skin rashes, and, in a few patients, hypothyroidism—these are often manageable. Alice Park, Time, 28 Apr. 2025 See All Example Sentences for hypothyroidism

Word History

Etymology

International Scientific Vocabulary

First Known Use

1905, in the meaning defined above

Time Traveler
The first known use of hypothyroidism was in 1905

Browse Nearby Words

Cite this Entry

“Hypothyroidism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypothyroidism. Accessed 5 Jun. 2025.

Kids Definition

hypothyroidism

noun
hy·​po·​thy·​roid·​ism ˌhī-pō-ˈthī-ˌrȯid-ˌiz-əm How to pronounce hypothyroidism (audio)
: too little activity of the thyroid gland
also : the abnormal bodily condition that results from this
hypothyroid
-ˌrȯid
adjective

Medical Definition

hypothyroidism

noun
hy·​po·​thy·​roid·​ism -ˌiz-əm How to pronounce hypothyroidism (audio)
: deficient activity of the thyroid gland
also : a resultant bodily condition characterized by lowered metabolic rate and general loss of vigor

More from Merriam-Webster on hypothyroidism

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!