from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The thyroid gland.
  • n. The thyroid cartilage.
  • n. A dried, powdered preparation of the thyroid gland of certain domestic animals, used in treatment of hypothyroid conditions.
  • n. An artery, a vein, a nerve, or another part associated with the thyroid gland or thyroid cartilage.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The thyroid gland.
  • n. The thyroid cartilage.
  • n. A preparation obtained from the thyroid gland.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Shaped like an oblong shield; shield-shaped.
  • adj. Of or pertaining to the thyroid body, thyroid cartilage, or thyroid artery; thyroideal.

from The Century Dictionary and Cyclopedia

  • Shield-shaped.
  • Superior, a branch of the external carotid, distributed to the sternothyroid, sternohyoid, and omohyoid muscles and the thyroid body, and giving off the hyoid, sternomastoid, laryngeal, and cricothyroid branches.
  • Inferior, a branch of the thyroid axis, passing beneath the great cervical vessels to be distributed to the lower part of the thyroid body, to the scalenus anticus, longus colli, inferior constrictor, and the infrahyoid muscles, and giving off the ascending cervical, inferior laryngeal, tracheal, and esophageal branches.
  • n. The thyroid cartilage.
  • n. The thyroid gland.
  • n. A thyroid artery, vein, or nerve.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. located near the base of the neck
  • adj. of or relating to the thyroid gland
  • adj. suggestive of a thyroid disorder


Greek thureoeidēs : thureos, oblong shield (from thurā, door) + -oeidēs, -oid.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek θυρεοειδής (thyreoeidēs, "shield-shaped"), from θυρεός (thyreos, "a large oblong shield") + εἶδος (eidos, "a form, shape"). (Wiktionary)



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