day·​side | \ ˈdā-ˌsīd How to pronounce dayside (audio) \

Definition of dayside

: the side of a planet in sunlight

Examples of dayside in a Sentence

Recent Examples on the Web The species residing on its permanent dayside may be completely different from those on its colder nightside, exhibiting distinct patterns of enforced sleep. Avi Loeb, Scientific American, "Why Do We Assume Extraterrestrials Might Want to Visit Us?," 21 Jan. 2021 Gudipati suspects that this glowing effect occurs all across Europa, but is likely too dim to spot in the sun’s glare on the moon’s dayside. Marina Koren, The Atlantic, "Jupiter Might Have a Glow-in-the-Dark Moon," 10 Nov. 2020 But in Way and Del Genio's model, a giant cloud on the dayside would act as a bright shield to reflect incoming sunlight and allow temperatures cool enough for liquid water. Shannon Hall, Scientific American, "Model Suggests Toxic Transformation on Venus," 13 July 2020 Here, the dark sides of these planets are in perpetual night, and the warming effect wins out, whereas on the dayside, the cooling effect wins out. Fox News, "Planets that have 'significant airborne dust' could be home to alien life, study says," 10 June 2020 The researchers believe that the dayside's blazing temperatures, which are hot enough to turn molecules into atoms and metal into vapor, create iron vapor. Ashley Strickland, CNN, "Iron rain could be falling on this hot exoplanet," 11 Mar. 2020 As a result, the magnetic field on the dayside of our planet receives a little extra boost, while the nightside is slightly weaker. National Geographic, "Mars is humming. Scientists aren’t sure why.," 24 Feb. 2020 In this case, the temperature difference isn't a large one, meaning that heat likely flows from the dayside to the nightside. Ashley Strickland, CNN, "How hot is it? The hottest-known exoplanet is so hot it rips apart its own molecules," 28 Jan. 2020 These planets are tidally locked, so that the same side always faces the star, and depending on how much the heat gets redistributed, the dayside can be much hotter than the nightside. John Wenz, Ars Technica, "Lessons from scorching hot weirdo-planets," 22 Dec. 2019

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

1827, in the meaning defined above

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Time Traveler for dayside

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The first known use of dayside was in 1827

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Statistics for dayside

Last Updated

4 Mar 2021

Cite this Entry

“Dayside.” Dictionary, Merriam-Webster, Accessed 13 Apr. 2021.

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