hypothyroidism

noun

hy·​po·​thy·​roid·​ism ˌhī-pō-ˈthī-ˌrȯi-ˌdi-zəm 

: 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

If none of these causes resonate, there are more common causes, including water quality (particularly hard water), as well as underlying health issues like hypothyroidism. — Dominic Cadogan, Glamour, 25 July 2026

Common dog endocrine diseases that increase blood lipid levels (such as Cushing’s disease and hypothyroidism) can also predispose dogs to pancreatitis. — The Washington Post, San Diego Union-Tribune, 25 July 2026

This temporary thyroid inflammation can cause under active thyroid levels (hypothyroidism), which lists intensely dry skin as a primary symptom. — Lauren Brown West-Rosenthal, Parents, 28 May 2026

Quiroz Zapata has diabetes, hyperlipidemia and hypothyroidism, O’Neal told the Times. — Karina Tsui, CNN Money, 14 May 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1905, in the meaning defined above

Rhymes for hypothyroidism

• absolutism
• adventurism
• aestheticism
• africanism
• agnosticism
• alcoholism
• anachronism
• anglicanism
• antagonism
• arianism
• asceticism
• astigmatism

Kids Definition

hypothyroidism

noun

hy·​po·​thy·​roid·​ism ˌhī-pō-ˈthī-ˌrȯid-ˌiz-əm 

: 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 

: deficient activity of the thyroid gland

also : a resultant bodily condition characterized by lowered metabolic rate and general loss of vigor