thyroid

[ thahy-roid ]
/ ˈθaɪ rɔɪd /
|

adjective

of or relating to the thyroid gland.
of or relating to the largest cartilage of the larynx, forming the projection known in humans as the Adam's apple.

noun

the thyroid cartilage.
an artery, vein, etc., in the thyroid region.
Medicine/Medical. a preparation made from the thyroid glands of certain animals, used in treating hypothyroid conditions.

Origin of thyroid

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thyroid

British Dictionary definitions for thyroid

thyroid

/ (ˈθaɪrɔɪd) /

adjective

of or relating to the thyroid gland
of or relating to the largest cartilage of the larynx

noun

Also: thyroid extract the powdered preparation made from the thyroid gland of certain animals, used to treat hypothyroidism

Word Origin for thyroid

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

Medicine definitions for thyroid

thyroid

[ thīroid′ ]

n.

The thyroid gland.
The thyroid cartilage.
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.

Related forms

thyroid′ adj.thy•roidal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Culture definitions for thyroid

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 New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.