arc second

noun

Examples of arc second 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.
Fudd instantly silenced the Huskies coach’s blustering by draining her fourth shot from beyond the arc seconds after Georgetown’s make. Emily Adams, Hartford Courant, 27 Feb. 2026 The Gaia satellite, however, is off by no more than 24 millionths of an arc second, the width of a human hair from 1,000 kilometers away. Ann Finkbeiner, Scientific American, 1 Feb. 2024

Word History

First Known Use

1885, in the meaning defined above

Time Traveler
The first known use of arc second was in 1885

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Cite this Entry

“Arc second.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arc%20second. Accessed 5 Jul. 2026.

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