thyroid

Etymology

Borrowed from New Latin thyreoīdēs, from Ancient Greek θῠρεοειδής (thureoeidḗs, “shield-shaped”), from θῠρεός (thureós, “oblong shield”) + -ειδής (-eidḗs, “-form, -like”).

adj

1. (anatomy) Of, relating to, or being the thyroid cartilage.
2. (anatomy) Of, relating to, or being the thyroid gland.
   1. Suggestive of a disordered thyroid gland.
      a thyroid personality

noun

1. (anatomy) Ellipsis of thyroid cartilage..
2. (anatomy) Ellipsis of thyroid gland..
   Israel is one of the few countries that widely fluoridates, besides the United States, Canada, Ireland, New Zealand and Australia. Fluoridation, the addition of fluoride to public drinking water supplies to reduce cavities, is the subject of intense controversy, especially outside of the United States. But opposition to the practice, on the grounds that fluoride has adverse effects on the thyroid, brain and bones, and is an unethical form of mass-medication, appears to be growing. 2013-08-09, Douglas Main, “Israel Outlaws Water Fluoridation”, in Live Science, retrieved 2013-09-30
   1. (medicine) An extract prepared from the thyroid gland of animals and used in treating deficiency of thyroid hormones.