adjective Pathology.
of, pertaining to, or having hyperthyroidism.
characterized by extreme intensity, emotionalism, or lack of restraint: hyperthyroid journalism.

1915–20; hyper- + thyroid

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World English Dictionary
hyperthyroidism (ˌhaɪpəˈθaɪrɔɪˌdɪzəm)
See exophthalmic goitre Also called: thyrotoxicosis overproduction of thyroid hormone by the thyroid gland, causing nervousness, insomnia, sweating, palpitation, and sensitivity to heat
adj, —n

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Example sentences
Within a couple of years his father died, his marriage broke up, he was plagued by a hyperthyroid illness.
The lower leg jerked, but it wasn't a bounce-off-the-ceiling hyperthyroid reflex.
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