Definition of hyperthyroidism in US English:

hyperthyroidism

noun

Medicine
  • Overactivity of the thyroid gland, resulting in a rapid heartbeat and an increased rate of metabolism.

    Also called thyrotoxicosis
    • ‘Evaluation may also be appropriate for women who develop postpartum symptoms of hyperthyroidism or hypothyroidism.’
    • ‘These tests can help determine if a patient has thyroid problems, including hyperthyroidism and cancer or other growths.’
    • ‘It is unusual for patients with nodular thyroid disease to have hyperthyroidism or hypothyroidism.’
    • ‘You review the symptoms of hypothyroidism and hyperthyroidism with her and find that she has none of them.’
    • ‘The symptoms of both hyperthyroidism and hypothyroidism are non-specific and can be mimicked by other conditions.’

Pronunciation

hyperthyroidism

/ˌhīpərˈTHīroiˌdizəm//ˌhaɪpərˈθaɪrɔɪˌdɪzəm/