1

thyroid

play
adjective thy·roid \ˈthī-ˌrȯid\

Definition of thyroid

  1. 1a :  of, relating to, or being the thyroid glandb :  suggestive of a disordered thyroid <a thyroid personality>

  2. 2 :  of, relating to, or being the chief cartilage of the larynx

Variants of thyroid

less commonly

thyroidal

play \thī-ˈrȯi-dəl\

Origin and Etymology of thyroid

New Latin thyroides, from Greek thyreoeidēs shield-shaped, thyroid, from thyreos shield shaped like a door, from thyra door — more at door


First Known Use: circa 1741


2

thyroid

noun thy·roid

Definition of thyroid

  1. 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. 2 :  a preparation of the thyroid gland of various domestic animals used in treating thyroid disorders

1787

First Known Use of thyroid

1787


THYROID Defined for English Language Learners


2

thyroid

noun thy·roid

Definition of thyroid for English Language Learners

  • medical : a small gland in the neck that affects growth


THYROID Defined for Kids

thyroid

play
noun thy·roid \ˈthī-ˌrȯid\

Definition of thyroid for Students

  1. :  a gland at the base of the neck that produces hormones which affect growth, development, and the rate at which the body uses energy


Medical Dictionary

1

thyroid

play
adjective thy·roid \ˈthī-ˌrȯid\

Medical Definition of thyroid

  1. 1a:  of, relating to, affecting, or being the thyroid gland <thyroid disorders>

  2. 2:  of, relating to, or being the thyroid cartilage

Variants of thyroid

also

thyroidal

\thī-ˈrȯid-əl\play

2

thyroid

noun thy·roid

Medical Definition of thyroid

  1. 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. 2:  a preparation of the thyroid gland of various domesticated food animals (as pigs) containing approximately 110 percent of iodine combined in thyroxine and used in treating thyroid disorders—called also thyroid extract

Illustration of thyroid


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