di·​el ˈdī-əl How to pronounce diel (audio)
: involving a 24-hour period that usually includes a day and the adjoining night
diel fluctuations in temperature

Word History


irregular from Latin dies day + English -al

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of diel was in 1934

Dictionary Entries Near diel

Cite this Entry

“Diel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diel. Accessed 30 Jan. 2023.

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