thy·roid
ˈthī-ˌrȯid 
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
thy·roid
ˈthī-ˌrȯid
variants
or less commonly thyroidal
1
a
: 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
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Clare Coulson,
Condé Nast Traveler,
2 July 2026
Shah believes that factors that can impact this include low stomach acid, gut inflammation, high calcium intake along with iron, and thyroid imbalances.
—
Tatiana Dias,
Vogue,
30 June 2026
Taylor Seely,
The Arizona Republic,
30 Dec. 2022
Baffert, like many trainers, was using a thyroid drug that was cited in the CHRB investigation.
—
Los Angeles Times,
1 Oct. 2021
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Noun
In between the stress-busting movement, a raft of blood work and tests is conducted, with ultrasounds of my liver and thyroid, and equally crucial checks on muscle mass and bone density.
—
Clare Coulson,
Condé Nast Traveler,
2 July 2026
Shah believes that factors that can impact this include low stomach acid, gut inflammation, high calcium intake along with iron, and thyroid imbalances.
—
Tatiana Dias,
Vogue,
30 June 2026
Adjective
Arizona's top attorney sued a thyroid drug maker, saying the company lied about the potency of its medication and the harmful effects on consumers.
—
Taylor Seely,
The Arizona Republic,
30 Dec. 2022
Baffert, like many trainers, was using a thyroid drug that was cited in the CHRB investigation.
—
Los Angeles Times,
1 Oct. 2021
See All Example Sentences for thyroid
Cite this Entry
“Thyroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thyroid. Accessed 6 Jul. 2026.
Copy CitationKids Definition
thyroid
1 of 2 adjective
thy·roid
ˈthī-ˌrȯid
: of, relating to, or being the thyroid gland
thyroid
2 of 2 noun
: a large endocrine gland at the base of the neck of most vertebrates that produces iodine-containing hormones (as thyroxine) that affect growth, development, and metabolism
called also thyroid gland
Medical Definition
thyroid
1 of 2 adjective
thy·roid
ˈthī-ˌrȯid
variants
also thyroidal
1
a
: of, relating to, affecting, or being the thyroid gland
thyroid disorders
2
: of, relating to, or being the thyroid cartilage
thyroid
2 of 2 noun1
: 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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