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thyroid

[thahy-roid] /ˈθaɪ rɔɪd/
adjective
1.
of or relating to the thyroid gland.
2.
of or relating to the largest cartilage of the larynx, forming the projection known in humans as the Adam's apple.
noun
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
1685-1695
1685-95; variant of thyreoid < Greek thyreoeidḗs shield-shaped, equivalent to thyre(ós) oblong shield (literally, doorlike object, equivalent to thýr(a) door + -eos adj. suffix) + -oeidēs -oid
Related forms
thyroidal, adjective
thyroidless, adjective
antithyroid, adjective, noun
postthyroidal, adjective
prethyroid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for thyroidal

thyroid

/ˈθaɪrɔɪd/
adjective
1.
of or relating to the thyroid gland
2.
of or relating to the largest cartilage of the larynx
noun
3.
4.
Also thyroid extract. the powdered preparation made from the thyroid gland of certain animals, used to treat hypothyroidism
Word Origin
C18: from New Latin thyroidēs, from Greek thureoeidēs, from thureos oblong (literally: door-shaped) shield, from thura door
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for thyroidal

thyroid

adj.

1690s (in reference to both the cartilage and the gland), from Greek 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" (see -oid). The noun, short for thyroid gland, is recorded from 1849.

Online Etymology Dictionary, © 2010 Douglas Harper
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thyroidal in Medicine

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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thyroidal in Culture
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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