thyroid

noun
thy·​roid | \ ˈthī-ˌrȯid How to pronounce thyroid (audio) \

Definition of thyroid

 (Entry 1 of 2)

1 : a large bilobed endocrine gland of vertebrates lying at the anterior base of the neck and producing especially the hormones thyroxine and triiodothyronine
2 : a preparation of the thyroid gland of various domestic animals used in treating thyroid disorders

thyroid

adjective
thy·​roid | \ ˈthī-ˌrȯid How to pronounce thyroid (audio) \
variants: or less commonly thyroidal \ thī-​ˈrȯi-​dᵊl How to pronounce thyroidal (audio) \

Definition of thyroid (Entry 2 of 2)

1a : of, relating to, or being the thyroid gland
b : suggestive of a disordered thyroid a thyroid personality
2 : of, relating to, or being the chief cartilage of the larynx

Examples of thyroid in a Sentence

Recent Examples on the Web: Noun

It's absorbed mostly by the thyroid gland, destroying those cells. Michael Nedelman, CNN, "Treatment for overactive thyroid linked to increased risk of dying from cancer," 1 July 2019 Low-level exposure causes trouble breathing, chest pain, vomiting, headaches and enlargement of the thyroid gland. Bruce Finley, The Denver Post, "Suncor oil refinery operators hit by Colorado health department for emitting toxic gas," 1 July 2019 Recent studies have linked PFAS compounds to thyroid cancer, reproductive problems, kidney and liver disease, obesity and increased cholesterol troubles. Gregory B. Hladky, courant.com, "Chemical spill in Farmington River a ‘sucker punch’ to people living along its banks," 1 July 2019 Rodriguez also spoke about her battle with Hashimoto’s thyroiditis, an autoimmune disorder in which the immune system attacks the thyroid gland and often includes depression as a symptom. Christina Oehler, Health.com, "‘Jane the Virgin’ Star Gina Rodriguez’s Opens Up About Her Mental Health and Battling Depression," 18 June 2019 Specifically, chemicals like BPA, BPS, and phthalates are known to mimic hormones like estrogen, interfere with important hormone pathways in the thyroid gland, and inhibit the effects of testosterone. Julia Belluz, Vox, "Sperm counts are falling. This isn’t the reproductive apocalypse — yet.," 30 May 2019 The milk delivered substantial radiation doses to children's thyroid glands. Ryan Randazzo, azcentral, "How Arizona's Palo Verde nuclear plant — the largest in the U.S. — is different from Chernobyl," 12 Apr. 2018 Studies have linked the long-lasting chemical compound PFAS to a wide variety of serious health issues that include reproductive problems, cancer, thyroid illnesses, kidney disease, obesity, high cholesterol and liver damage. Gregory B. Hladky, courant.com, "Tests show PFAS foam chemicals remain in Farmington River, but state says it’s safe for boating, swimming," 21 June 2019 Array’s drug targets a mutation called BRAF, which can show up in some forms of melanoma, colorectal and thyroid cancers, among others. Drew Armstrong, BostonGlobe.com, "Pfizer expands in cancer care with $10.6 billion deal for Array," 17 June 2019

Recent Examples on the Web: Adjective

Soy foods don’t affect thyroid function in people with healthy thyroids, found a Loma Linda University review of 14 studies. Marygrace Taylor, Good Housekeeping, "Is Soy Good or Bad for You? Here's the Science-Backed Answer," 18 July 2018 Soy foods don’t affect thyroid function in people with healthy thyroids, found a Loma Linda University review of 14 studies. Marygrace Taylor, Good Housekeeping, "Is Soy Good or Bad for You? Here's the Science-Backed Answer," 18 July 2018 Soy foods don’t affect thyroid function in people with healthy thyroids, found a Loma Linda University review of 14 studies. Marygrace Taylor, Good Housekeeping, "Is Soy Good or Bad for You? Here's the Science-Backed Answer," 18 July 2018 Soy foods don’t affect thyroid function in people with healthy thyroids, found a Loma Linda University review of 14 studies. Marygrace Taylor, Good Housekeeping, "Is Soy Good or Bad for You? Here's the Science-Backed Answer," 18 July 2018 Possible causes include thyroid surgery to fully or partially remove the gland for some reason, like cancer. Carolyn L. Todd, SELF, "Are Hashimoto’s Disease and Hypothyroidism the Same Thing?," 14 May 2018 Treatment involves taking a once-daily dose of levothyroxine, a synthetic replacement for thyroid hormone, according to the National Institute of Diabetes and Digestive and Kidney Diseases. Carolyn L. Todd, SELF, "Are Hashimoto’s Disease and Hypothyroidism the Same Thing?," 14 May 2018 Taught Me How to Sink or Swim’ Miller was hospitalized for what was believed to be a thyroid condition on April 10, two weeks after she was released from prison and transferred to a halfway house. Mariah Haas, PEOPLE.com, "Dance Moms' JoJo Siwa Visited Ex-Coach Abby Lee Miller in the Hospital: 'She Was Not Good'," 20 Apr. 2018 Babies and young children, whose thyroid gland is one of the most radiation-sensitive parts of the body, are at highest risk. Erika Butler, The Aegis, "Harford residents near Peach Bottom atomic plant need potassium iodide on hand," 23 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thyroid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of thyroid

Noun

1787, in the meaning defined at sense 1

Adjective

circa 1741, in the meaning defined at sense 1a

History and Etymology for thyroid

Adjective

New Latin thyroides, from Greek thyreoeidēs shield-shaped, thyroid, from thyreos shield shaped like a door, from thyra door — more at door

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Statistics for thyroid

Last Updated

11 Jul 2019

Look-up Popularity

Time Traveler for thyroid

The first known use of thyroid was circa 1741

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More Definitions for thyroid

thyroid

noun

English Language Learners Definition of thyroid

medical : a small gland in the neck that affects growth

thyroid

noun
thy·​roid | \ ˈthī-ˌrȯid How to pronounce thyroid (audio) \

Kids Definition of thyroid

: a gland at the base of the neck that produces hormones which affect growth, development, and the rate at which the body uses energy

thyroid

adjective
thy·​roid | \ ˈthī-ˌrȯid How to pronounce thyroid (audio) \
variants: also thyroidal \ thī-​ˈrȯid-​ᵊl How to pronounce thyroidal (audio) \

Medical Definition of thyroid

 (Entry 1 of 2)

1a : of, relating to, affecting, or being the thyroid gland thyroid disorders
2 : of, relating to, or being the thyroid cartilage

thyroid

noun

Medical Definition of thyroid (Entry 2 of 2)

1 : a large bilobed endocrine gland of craniate vertebrates that arises as a median ventral outgrowth of the pharynx, lies in the anterior base of the neck or anterior ventral part of the thorax, is often accompanied by lateral accessory glands sometimes more or less fused with the main mass, and produces especially the hormones thyroxine and triiodothyronine

called also thyroid gland

2 : a preparation of the thyroid gland of various domesticated food animals (as pigs) containing approximately ¹/₁₀ percent of iodine combined in thyroxine and used in treating thyroid disorders

called also thyroid extract

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More from Merriam-Webster on thyroid

Rhyming Dictionary: Words that rhyme with thyroid

Spanish Central: Translation of thyroid

Nglish: Translation of thyroid for Spanish Speakers

Britannica.com: Encyclopedia article about thyroid

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