hy·​per·​thy·​roid ˌhī-pər-ˈthī-ˌrȯid How to pronounce hyperthyroid (audio)
: of, relating to, or affected with hyperthyroidism

Examples of hyperthyroid in a Sentence

Recent Examples on the Web After an oblique tear ended his 2016 season and he was diagnosed with hyperthyroid disease in 2017, Hawkins was released in 2018. Rusty Simmons, SFChronicle.com, 26 Aug. 2019 Because of a hyperthyroid condition, Agrawal used to poop up to eight times a day. Jason Kehe, WIRED, 17 June 2019 Another possibility was a hyperthyroid condition, but that usually causes a fast heartbeat. Tony Dajer, Discover Magazine, 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, 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, 16 May 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hyperthyroid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


back-formation from hyperthyroidism

First Known Use

1916, in the meaning defined above

Time Traveler
The first known use of hyperthyroid was in 1916

Dictionary Entries Near hyperthyroid

Cite this Entry

“Hyperthyroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperthyroid. Accessed 30 May. 2024.

Medical Definition


1 of 2 adjective
hy·​per·​thy·​roid -ˈthī-ˌrȯid How to pronounce hyperthyroid (audio)
: of, relating to, or affected with hyperthyroidism
a hyperthyroid state
a hyperthyroid patient


2 of 2 noun
: a person affected with hyperthyroidism
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