di·​el | \ ˈdī-əl How to pronounce diel (audio) , -ˌel \

Definition of diel

: involving a 24-hour period that usually includes a day and the adjoining night diel fluctuations in temperature

First Known Use of diel

1934, in the meaning defined above

History and Etymology for diel

irregular from Latin dies day + English -al

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Cite this Entry

“Diel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diel. Accessed 23 Oct. 2020.

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