dayside

noun

day·​side ˈdā-ˌsīd How to pronounce dayside (audio)
: the side of a planet in sunlight

Examples of dayside 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.
Researchers used the telescope's Near-Infrared Spectrograph to measure the exoplanet's dayside temperature. Kerry Breen, CBS News, 12 Dec. 2025 To test whether the planet has an atmosphere, the team used the JWST's NIRSpec instrument to measure the temperature of TOI-561 b's dayside. Sharmila Kuthunur, Space.com, 11 Dec. 2025 The anchor previously hosted a dayside hour on MSNBC, but lost that program in a programming shakeup connected to the NBCUniversal and Versant split. Alex Weprin, HollywoodReporter, 22 Oct. 2025 WASP-39b is about the size of Saturn and whips around its sunlike star once every four days; that broiling orbit heats the planet’s dayside to 1,430 degrees Fahrenheit (776 degrees Celsius). Nola Taylor Tillman, Scientific American, 13 Oct. 2025 See All Example Sentences for dayside

Word History

First Known Use

1827, in the meaning defined above

Time Traveler
The first known use of dayside was in 1827

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Cite this Entry

“Dayside.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dayside. Accessed 15 Dec. 2025.

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