Definition of "thyroid" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And at that time he said because of her pre-existing medical condition, which he described as a thyroid condition, that he would not do the surgery unless there was some medical clearance."
• "The drops are used to protect your child's thyroid from the radioactive portion of the medicine we inject during the study."
• "Upon return to the Nuclear Medicine Department 2 to 4 hours later, a measurement of the thyroid is taken using a special probe placed on your child's neck."