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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
When solar cycle activity picks up sunspots appear as black areas on the sun's surface. Jamie Carter, Space.com, 28 Feb. 2025 Coronal holes may superficially appear to be similar to sunspots, as both appear as dark blotches on our star. Josh Hammer, Newsweek, 14 Feb. 2025 Sudden changes in the configuration of a sunspot’s magnetic field, called a magnetic reconnection, can release a huge amount of energy, causing a solar flare. Meghan Bartels, Scientific American, 30 Dec. 2024 Twas the night before Christmas, when all through the Solar cycle, Not a sunspot was stirring, not even a burst; The stockings were all hung by the corona with care, In hopes that the Parker Solar Probe would soon be there. Eric Berger, Ars Technica, 19 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

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Cite this Entry

“Sunspot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sunspot. Accessed 21 Mar. 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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