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Thyroid

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thy⋅roid

  [thahy-roid]
Use Thyroid in a Sentence
–adjective
1. of or pertaining to the thyroid gland.
2. of or pertaining to the largest cartilage of the larynx, forming the projection known in humans as the Adam's apple.
–noun
3. thyroid gland.
4. the thyroid cartilage.
5. an artery, vein, etc., in the thyroid region.
6. Medicine/Medical. a preparation made from the thyroid glands of certain animals, used in treating hypothyroid conditions.
Origin:
1685–95; var. of thyreoid < Gk thyreoeids shield-shaped, equiv. to thyre(ós) oblong shield (lit., doorlike object, equiv. to thýr(a) door + -eos adj. suffix) + -oeidēs -oid

Related forms:
thy⋅roi⋅dal, adjective
thy⋅roid⋅less, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To Thyroid
Thyroid
Unsure About Your Thyroid Health? Speak to Our Thyroid Doctors Today.
www.holtorfmed.com
Thyroid Underactive?
Restore Your Thyroid with Iodine Lose Weight by Increased Metabolism
1-Thyroid.com
thy·roid   (thī'roid')   
n.  

  1. The thyroid gland.

  2. The thyroid cartilage.

  3. A dried, powdered preparation of the thyroid gland of certain domestic animals, used in treatment of hypothyroid conditions.

  4. An artery, a vein, a nerve, or another part associated with the thyroid gland or thyroid cartilage.


[Greek thureoeidēs : thureos, oblong shield (from thurā, door; see dhwer- in Indo-European roots) + -oeidēs, -oid.]
thy'roid' adj., thy·roi'dal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

thyroid [(theye-royd)]

A large gland in the neck that functions in the endocrine system. The thyroid secretes hormones that regulate growth and metabolism.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

thyroid  (adj.)
1693 (in ref. to both the cartilage and the gland), from Gk. thyreoiedes "shield-shaped" (in khondros thyreoiedes "shield-shaped cartilage," used by Galen to describe the "Adam's apple" in the throat), from thyreos "oblong, door-shaped shield" (from thyra "door") + -eides "form, shape." The noun, short for thyroid gland, is recorded from 1849.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: 1thy·roid
Pronunciation: 'thI-"roid
Variant: also thy·roi·dal /thI-'roid-&l/
Function:adjective
1 a : of, relating to, or being the thyroid gland <thyroid cancer> b : suggestive of a disordered thyroid thyroidpersonality>
2 : of, relating to, or being the thyroid cartilage

Main Entry: 2thyroid
Function: noun
1 : a large bilobed endocrine gland of craniate vertebrates that arises as a median ventral outgrowth of thepharynx, 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 producesespecially 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
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

thyroid thy·roid (thī'roid')
n.

  1. The thyroid gland.

  2. The thyroid cartilage.

  3. A powdered preparation of the thyroid gland of certain domestic animals, used in the treatment of cretinism and myxedema, in certain cases of obesity, and in skin disorders.

thy'roid' adj.
thy·roi'dal adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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