Pathologically excessive production of thyroid hormones.(noun)
The condition resulting from excessive activity of the thyroid gland, characterized by increased basal metabolism.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hyperthyroidism" in a sentence
"His hyperthyroidism is treated with a daily medication that is compounded into a gel and we rub it on his ears."
"This is called hyperthyroidism overactive thyroid."
"The woman later volunteered that she had hyperthyroidism, which is certainly nothing to envy."