hy·​per·​thy·​roid | \ ˌhī-pər-ˈthī-ˌrȯid How to pronounce hyperthyroid (audio) \

Definition of hyperthyroid

: 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, "Giants minor-leaguer Courtney Hawkins enters record book with 3-homer night," 26 Aug. 2019 Because of a hyperthyroid condition, Agrawal used to poop up to eight times a day. Jason Kehe, WIRED, "Change Your Life: Bestride the Bidet," 17 June 2019 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.

See More

First Known Use of hyperthyroid

1916, in the meaning defined above

History and Etymology for hyperthyroid

back-formation from hyperthyroidism

Keep scrolling for more

Learn More about hyperthyroid

Time Traveler for hyperthyroid

Time Traveler

The first known use of hyperthyroid was in 1916

See more words from the same year

Statistics for hyperthyroid

Cite this Entry

“Hyperthyroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperthyroid. Accessed 9 Aug. 2020.

Keep scrolling for more

More Definitions for hyperthyroid


hy·​per·​thy·​roid | \ -ˈthī-ˌrȯid How to pronounce hyperthyroid (audio) \

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

Comments on hyperthyroid

What made you want to look up hyperthyroid? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!