I. ˈthī-ˌrȯid adjective
also thy·roi·dal thī-ˈrȯi-d ə l
Etymology: New Latin thyroides, from Greek thyreoeidēs shield-shaped, thyroid, from thyreos shield shaped like a door, from thyra door — more at door
Date: circa 1741
1.
a. : 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
II. noun
Date: 1787
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