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

In this condition, a deficiency of thyroid hormones causes a slowing of metabolism, which governs how your body uses energy. Carolyn L. Todd, SELF, "How Much Sleep Do I Need?," 21 Mar. 2019 Graves’ disease is a long-life condition that affects the thyroid, causing anxiety, heat sensitivity, and weight loss, among other symptoms. Selena Barrientos, Good Housekeeping, "'Wendy Williams Show' Fans Have Mixed Reactions to Her Comeback Show," 4 Mar. 2019 Graves' disease is an immune system disorder that causes the overproduction of thyroid hormones, according to Mayo Clinic. Selena Barrientos, Good Housekeeping, "'The Wendy Williams Show' Replaced Wendy With Nick Cannon While She Recovers," 30 Jan. 2019 Treatment for hypothyroidism involves taking a daily dose of a synthetic replacement for thyroid hormone called levothyroxine, the NIDDK explains. Carolyn L. Todd, SELF, "7 Reasons You Might Be Feeling Cold All the Time," 16 Oct. 2018 While an underactive thyroid can cause weight gain, an overactive one (which is diagnosed as hyperthyroidism) increases your metabolism, which can in turn cause increased hunger, Gilwit says. Colleen Stinchcombe, Woman's Day, "Why Am I Always Hungry?," 19 Oct. 2018 The Courier Journal reported last week that the board was investigating Bates for prescribing thyroid and testosterone hormones to patients who had normal levels of both, allegedly in violation of acceptable and prevailing standards of medicine. Andrew Wolfson, The Courier-Journal, "Kentucky stops '25 Again' doctor from practicing hormone therapy," 21 June 2018 In one landmark study published in 2015, 122 patients with several different types of cancer — lung, colon, thyroid — were found to have the same mutation in common, and thus treated with the same drug, vemurafenib. Siddhartha Mukherjee, New York Times, "The Search for Cancer Treatment Beyond Mutant-Hunting," 13 June 2018 One farm-economy byproduct is manure, which farmers spread across millions of acres and contains nutrients such as nitrates that researchers have associated with birth defects, thyroid problems, cancer and a potentially fatal condition in infants. Jesse Newman And Patrick Mcgroarty, WSJ, "Farms, More Productive Than Ever, Are Poisoning Drinking Water in Rural America," 18 Jan. 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

2 May 2019

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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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