Bible Encyclopedias
Epact

The Nuttall Encyclopedia

A name given to the excess of the solar month over the lunar, amounting to 1 day 11 hours 11 minutes and 57 seconds, and of the solar year over the lunar amounting to 11 days.

Bibliography Information
Wood, James, ed. Entry for 'Epact'. The Nuttall Encyclopedia. https://www.studylight.org/​encyclopedias/​eng/​nut/​e/epact.html. Frederick Warne & Co Ltd. London. 1900.