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Epact

1910 New Catholic Dictionary

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American Church Dictionary
• Epact, the
1910 New Catholic Dictionary
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Webster Dictionary
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Encyclopedias
McClintock and Strong's Bible Encyclopedia
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• Epact (2)
The Nuttall Encyclopedia
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The Catholic Encyclopedia
• Epact

(Greek: epi, upon; ago, lead)

Term given to the surplus days of the solar year over the year of 12 lunar months, or the moon's age in days on the first day of a year. The system of epacts is based on the Metonic Lunar Cycle, and it is employed to determine the time of the ecclesiastical new moon.