sunspot

noun

sun·​spot ˈsən-ˌspät How to pronounce sunspot (audio)
: 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
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The center monitors sunspots, solar flares and plasma emissions called coronal mass ejections that could impact the electrical grid, communication, satellites and more. Chad Murphy, The Enquirer, 31 Dec. 2024 These flares are typically linked to active regions on the sun, which are often visible as sunspots—areas where the magnetic fields are most concentrated and dynamic. George Monastiriakos, Newsweek, 30 Dec. 2024 The sun exhibits an 11-year cycle in its activity, which in 2014 was at its peak, when sunspots were common and these coronal loops arced above them. Phil Plait, Scientific American, 25 Oct. 2024 His sketches captured sunspots, which helped astronomers determine that the solar cycles were still occurring as expected when Kepler observed them, rather than lasting for abnormally long amounts of time as previously believed. Cnn, The Mercury News, 25 Dec. 2024 See all Example Sentences for sunspot 

Word History

First Known Use

1676, in the meaning defined above

Time Traveler
The first known use of sunspot was in 1676

Dictionary Entries Near sunspot

Cite this Entry

“Sunspot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sunspot. Accessed 14 Jan. 2025.

Kids Definition

sunspot

noun
sun·​spot -ˌspät How to pronounce sunspot (audio)
: one of the dark spots that appear from time to time on the sun's surface and are usually visible only through a telescope

More from Merriam-Webster on sunspot

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