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.
If the planet’s dayside initially held liquid oceans, that water’s evaporation would have formed thick clouds. — Quanta Magazine, 15 Sep. 2025 Temperatures on its dayside climb high enough to vaporize metals, while previous studies have suggested that iron may condense and fall as rain on the cooler nightside. — Sharmila Kuthunur, Space.com, 16 June 2026 Those changes--across dayside, weekends and in the key weeknight prime time hours--come as MS NOW continues to see significant viewership growth. — Mark Joyella, Forbes.com, 3 June 2026 Researchers used the telescope's Near-Infrared Spectrograph to measure the exoplanet's dayside temperature. — Kerry Breen, CBS News, 12 Dec. 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

Rhymes for dayside

See All Rhymes for dayside

Browse Nearby Words

dayshine
dayside
day-sign
See all Nearby Words

Cite this Entry

“Dayside.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dayside. Accessed 7 Jul. 2026.

Copy Citation
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All