Definitions

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

  • n. The physiological state characterized by normal serum levels of thyroid hormone.
  • n. Normal functioning of the thyroid gland.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Normal functioning of the thyroid or the physiological state as a result thereof, usually determined by the level of TSH and other thyroid-related functions.

Etymologies

eu- + thyroid + -ism.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From euthyroid +‎ -ism (Wiktionary)

Examples

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