hy·​per·​thy·​roid | \ ˌhī-pər-ˈthī-ˌrȯid \

Definition of hyperthyroid

: of, relating to, or affected with hyperthyroidism

Examples of hyperthyroid in a Sentence

Recent Examples on the Web

Another possibility was a hyperthyroid condition, but that usually causes a fast heartbeat. Tony Dajer, Discover Magazine, "Vertigo, Panic and Trouble Breathing: What's Going On Here?," 19 Oct. 2018 The geriatric cat, too, had several medical conditions of his own, including severe dental disease, arthritis, hyperthyroidism, and an abnormal liver that may be caused by his hyperthyroid disease. Brittany Britto, baltimoresun.com, "Dundalk resident fosters 26-year-old cat named Thomas," 3 Apr. 2018 In 2015, a Swedish team found that hyperthyroid cats had significantly higher levels of three types of PBDEs in their blood than healthy cats did. Emily Anthes, New York Times, "The Mystery of the Wasting House-Cats," 16 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hyperthyroid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hyperthyroid

1916, in the meaning defined above

History and Etymology for hyperthyroid

back-formation from hyperthyroidism

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Time Traveler for hyperthyroid

The first known use of hyperthyroid was in 1916

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More Definitions for hyperthyroid


hy·​per·​thy·​roid | \ -ˈthī-ˌrȯid \

Medical Definition of hyperthyroid

 (Entry 1 of 2)

: of, relating to, or affected with hyperthyroidism a hyperthyroid state a hyperthyroid patient



Medical Definition of hyperthyroid (Entry 2 of 2)

: a person affected with hyperthyroidism

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