Thyroid

thī′roid, adj. in the form of a shield: denoting a cartilage constituting the anterior, upper part of the larynx, popularly called Adam's apple: denoting a vascular or ductle gland which arises in the earlier human embryo as an ingrowth from the lower part of the pharynx (see Myxœdem a). [Gr. thyreos , a shield, eidos , form.]