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epact
[ ee-pakt ]
noun
- the difference in days between a solar year and a lunar year.
- the number of days since the new moon at the beginning of the calendar year, January 1.
epact
/ ˈiːpækt /
noun
- the difference in time, about 11 days, between the solar year and the lunar year
- the number of days between the beginning of the calendar year and the new moon immediately preceding this
- the difference in time between the calendar month and the synodic month
Word History and Origins
Word History and Origins
Origin of epact1
Example Sentences
Epact — a play on a medieval word for the age of the moon on the first of the year — is the result of a pact of sorts between four European institutions: the Museum of the History of Science in Oxford; the Museo Galileo in Florence; the British Museum in London; and the Museum Boerhaave in Leiden, Netherlands.
And they’re on full display at Epact.
Epact may make you appreciate the artistry and intricacy of now-obsolete scientific tools or leave you starry-eyed over each instruments’ function and a role.
Either way, a visit to Epact is a glimpse into a bygone world — one in which scientists dared to dream and discover.
In its final report, the EPAct Task Force explained that:
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