sun·​spot | \ ˈsən-ˌspät How to pronounce sunspot (audio) \

Definition of sunspot

: any of the dark spots that appear at times on the sun's surface and are usually visible only through a telescope

Examples of sunspot in a Sentence

Recent Examples on the Web Lately, the sunspot cycles have been getting weaker. New York Times, 28 May 2021 Astronomers have charted the sun’s cycle of sunspot maximum and minimum for hundreds of years. Curtis Roelle,, 10 Apr. 2021 Indeed, a couple of large, highly complex sunspot groups formed near the end of the year 2020. Curtis Roelle,, 10 Apr. 2021 Meanwhile, a sunspot on the northern half of our star is bulking up. Eric Mack, Forbes, 25 Feb. 2021 Both are from the same active sunspot region (Active Region 2158) and are directed at Earth, said Thomas Berger, director of the Space Weather Prediction Center, during a news conference September 11. Laura Geggel, Scientific American, 12 Sep. 2014 Carrington described the flare as intensely bright, and as migrating from the left to the right of the sunspot over the span of about 5 minutes. Ethan Siegel, Forbes, 26 Feb. 2021 This week, the an active sunspot known as AR2158 sun fired off a moderate M4.6 solar flare on Monday, followed by a much more powerful X1.6-class flare on Wednesday, Sept. 10. Tariq Malik, Scientific American, 12 Sep. 2014 The colorful event is courtesy of a solar flare, which erupted out of a sunspot Monday. Doyle Rice, The Enquirer, 11 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sunspot.' 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 sunspot

1676, in the meaning defined above

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Time Traveler for sunspot

Time Traveler

The first known use of sunspot was in 1676

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Statistics for sunspot

Last Updated

11 Jun 2021

Cite this Entry

“Sunspot.” Dictionary, Merriam-Webster, Accessed 20 Jun. 2021.

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English Language Learners Definition of sunspot

astronomy : a dark spot that sometimes appears on the surface of the sun

More from Merriam-Webster on sunspot

Nglish: Translation of sunspot for Spanish Speakers Encyclopedia article about sunspot


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