WordReference Random House Unabridged Dictionary of American English © 2026
thy•ro•tox•ic
(thī′rō tok′sik),USA pronunciation adj. [Pathol.]
thy•ro•tox•ic•i•ty
(thī′rō tok sis′i tē),USA pronunciation n.
- Pathologyof or pertaining to a condition caused by excessive thyroid hormone in the system, usually resulting from overactivity of the thyroid gland.
- 1900–05; thyro- + toxic