epact

noun

ˈē-ˌpakt How to pronounce epact (audio) ˈe- How to pronounce epact (audio)
: a period added to harmonize the lunar with the solar calendar

Examples of epact 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.
These tables derive their lunar calculations (known as computus paschalis) from such elements as epacts and the Golden Number. —Joe Rao, Space.com, 12 Apr. 2025

Word History

Etymology

Middle French epacte, from Late Latin epacta, from Greek epaktē, from epagein to bring in, intercalate, from epi- + agein to drive — more at agent

First Known Use

1588, in the meaning defined above

Time Traveler
The first known use of epact was in 1588

Rhymes for epact

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Browse Nearby Words

epacris
epact
epactal
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Cite this Entry

“Epact.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epact. Accessed 22 Apr. 2025.

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Britannica.com: Encyclopedia article about epact

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