Definition of "hyperthyroid" [hyperthyroid]

• Of, relating to, or affected with hyperthyroidism. (adjective)

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.

• "Cat: Went back in for his recheck on his hyperthyroid, which is, after medication, at the high end of normal, but normal."
• "Thyrotoxic periodic paralysis also called hyperthyroid hypokalemic periodic paralysis"
• "While there is a very small chance that such a sleep problem could be caused by hyperthyroid, that is unlikely in Oprah's case because she is not losing weight."