Medical Dictionary
hyperthyroidism
noun hy·per·thy·roid·ism \-ˌrȯid-ˌiz-əm, -rəd-\
Medical Definition of HYPERTHYROIDISM
: excessive functional activity of the thyroid gland; also : the resulting condition marked especially by increased metabolic rate, enlargement of the thyroid gland, rapid heart rate, and high blood pressure—called also thyrotoxicosis; see graves' disease
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