thy·​roid·​itis ˌthī-ˌrȯi-ˈdī-təs How to pronounce thyroiditis (audio)
: inflammation of the thyroid gland

Examples of thyroiditis in a Sentence

Recent Examples on the Web Hashimoto’s thyroiditis, also known as Hashimotos’ disease, is an autoimmune disease in which the body’s immune system attacks the thyroid, leading to damage. Rebecca Jaspan, Mph, Health, 24 Jan. 2024 More prevalent in women, it’s also known as chronic lymphocytic thyroiditis, and is the most common cause of underactive thyroid in the U.S. Having another autoimmune disorder can put someone at elevated risk of developing Hashimoto’s. Isabella Cueto, STAT, 18 Aug. 2023 Antibodies to thyroid peroxidase are found in about 20% of healthy women, up to 40% of people with Type 1 diabetes, and in 90% to 100% of people with autoimmune thyroiditis (Hashimoto’s thyroiditis). Dr. Keith Roach, oregonlive, 10 June 2022 Some autoimmune diseases, such as Type 1 diabetes, are much more likely in young people, while others, like Hashimoto’s thyroiditis, are more common in older people. Dr. Keith Roach, oregonlive, 30 June 2023 Vitiligo is also sometimes associated with autoimmune and inflammatory diseases, such as Hashimoto's thyroiditis, scleroderma, rheumatoid arthritis, type 1 diabetes mellitus, psoriasis, Addison's disease, pernicious anemia, alopecia areata, systemic lupus erythematosus, and celiac disease. Emily Kirkpatrick, Peoplemag, 25 May 2023 However, the opposite condition, hypothyroidism, or Hashimoto's thyroiditis, characterized by a slower metabolism, fatigue, hair loss, and in some cases, weight gain, tends to be more common in white women. Women's Health, 22 Mar. 2023 These include Crohn’s disease, rheumatoid arthritis, lupus, Grave’s disease and Hashimoto thyroiditis. Gabe Allen, Discover Magazine, 2 Dec. 2021 The treatment for chronic thyroiditis is to replace the missing hormone with pills taken daily. H Lee Kagan, Discover Magazine, 11 Jan. 2011

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thyroiditis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


thyroid entry 1 + -itis

First Known Use

circa 1885, in the meaning defined above

Time Traveler
The first known use of thyroiditis was circa 1885

Dictionary Entries Near thyroiditis

Cite this Entry

“Thyroiditis.” Dictionary, Merriam-Webster, Accessed 17 Apr. 2024.

Medical Definition


thy·​roid·​itis ˌthī-ˌrȯid-ˈīt-əs, -rəd- How to pronounce thyroiditis (audio)
: inflammation of the thyroid gland

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