Thy"roid (?), a. [Gr. ? shield-shaped; ?
a large, oblong shield (from ? a door) + ? form: cf. F.
thyroïde, thyréoïde.] 1.
Shaped like an oblong shield; shield-shaped; as, the thyroid
cartilage.
2. (Anat.) Of or pertaining to the thyroid
body, thyroid cartilage, or thyroid artery; thyroideal.
Thyroid cartilage. See under Larynx. -
- Thyroid body, or Thyroid gland
(Anat.), a glandlike but ductless body, or pair of bodies, of
unknown function, in the floor of the mouth or the region of the larynx. In
man and most mammals it is a highly vascular organ, partly surrounding the
base of the larynx and the upper part of the trachea. --
Thyroid dislocation (Surg.), dislocation of
the thigh bone into the thyroid foramen. -- Thyroid
foramen, the obturator foramen.