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   thyroid

   /ˈθʌɪrɔɪd/

   noun

   • 1. a large ductless gland in the neck which secretes hormones regulating growth and development through the rate of metabolism: "thyroid function"
   • ▪ an extract prepared from the thyroid gland of animals and used in treating deficiency of thyroid hormones.
   • 2. a large cartilage of the larynx, a projection of which forms the Adam's apple in humans.

   Word Origin early 18th century (as an adjective): from Greek (khondros) thureoeidēs ‘shield-shaped (cartilage)’, from thureos ‘oblong shield’.

   Scrabble Points: 14

   • T

     1

   • H

     4

   • Y

     4

   • R

     1

   • O

     1

   • I

     1

   • D

     2

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