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 thyroid (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 His debut gospel album Share the News released in 2004, when he was diagnosed with thyroid cancer. Tyler Aquilina, EW.com, 9 Jan. 2022 Most recently, Simon recorded gospel music under his label Simon Sayz, releasing the album Share the News in 2004, when he was diagnosed and treated for thyroid cancer. Ashley Iasimone, Billboard, 8 Jan. 2022 In light of the evidence of post-Chernobyl thyroid cancer, researchers mounted a major effort to screen children in the area around Fukushima. Andrew Cockburn, Harper’s Magazine , 4 Jan. 2022 Parasite’s Park So-dam has been diagnosed with papillary thyroid cancer, her representatives at ArtistCompany said in a statement to CNN. Alejandra Gularte, Vulture, 14 Dec. 2021 In February of this year, Alba shared that her father Mark had recently recovered from COVID-19 and was also undergoing treatment for thyroid cancer. Carolyn L. Todd, SELF, 4 Dec. 2021 The thyroid is like the carburetor in an old internal-combustion engine. New York Times, 8 Sep. 2021 The thyroid is a gland located in your neck that largely controls your body's metabolism by regulating your hormones. Zee Krstic, Good Housekeeping, 6 Sep. 2021 Thyroid replacement, usually with thyroxine, the identical hormone made by the thyroid, is effective at returning blood hormone levels to normal and reversing any symptoms. Dr. Keith Roach, oregonlive, 30 Nov. 2021 Recent Examples on the Web: Adjective Baffert, like many trainers, was using a thyroid drug that was cited in the CHRB investigation. Los Angeles Times, 1 Oct. 2021 The pregnancy was delicate because of a thyroid condition Monica has, said Edgar, who works in a dairy while Monica stays home to care for their two other daughters. Rebekah L. Sanders, azcentral, 1 Jan. 2020 When thyroid hormones climb too high, the body destroys old bone faster than it can be replaced, which hastens osteoporosis. Hallie Levine, Health.com, 5 Dec. 2019 Neighbors and family members, even their own children, diagnosed with serious medical conditions, from thyroid disease to cancer. NBC News, 16 Dec. 2019 Keep in mind, though, that even when treatment successfully eliminates hypothyroidism in a case like yours, the underlying thyroid disorder remains. Mayo Clinic News Network, chicagotribune.com, 4 Oct. 2019 At the age of 12, Grace LaVigne developed a long-lasting friendship with a St. Paul doctor over an unlikely bonding experience — a thyroid tumor that caused frequent ear infections and could have done far worse. Frederick Melo, Twin Cities, 23 Oct. 2019 Examples included antibiotics, anti-inflammatory (ibuprofen), anti-depressants, anti-diabetics, stimulants (caffeine), and reproductive and thyroid hormones. David Taylor, Houston Chronicle, 13 Sep. 2019 The thyroid produces thyroid hormone (TH), which regulates your body's metabolism, heartbeat, temperature, mood, and other important processes—reaching out to nearly every single cell in your body. Maggie O'neill, Health.com, 17 July 2019

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

Noun

short for thyroid gland — more at thyroid entry 2

Adjective

borrowed from New Latin thyroīdēs, shortened from thyreoīdēs, borrowed from Greek thyreoeidḗs "shield-shaped (of the cartilage in the larynx)," from thyreós "stone put against a door to keep it shut, oblong shield" (probably originally noun derivative of an adjective meaning "shaped like a door," from thýra "door" + -eos, suffix of appurtenance) + -oeidēs -oid entry 2 — more at door

Note: The form thyroīdēs presumably arose because the word was taken as directly derived from thýra "door," rather than from thyreós. The word thyroeidḗs "like a door" is marginally attested in ancient Greek.

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Time Traveler for thyroid

Time Traveler

The first known use of thyroid was circa 1741

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Dictionary Entries Near thyroid

thyrohyoid arch

thyroid

thyroidectomy

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Statistics for thyroid

Last Updated

16 Jan 2022

Cite this Entry

“Thyroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thyroid. Accessed 21 Jan. 2022.

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More Definitions for thyroid

thyroid

noun

English Language Learners Definition of thyroid

: 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 thyroid (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

More from Merriam-Webster on thyroid

Nglish: Translation of thyroid for Spanish Speakers

Britannica.com: Encyclopedia article about thyroid

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