EPACT


Meaning of EPACT in English

n. the number of days by which the solar year exceeds the lunar year.

Etymology: F {eacute}pacte f. LL epactae f. Gk epaktai (hemerai) intercalated (days) f. epago intercalate (as EPI-, ago bring)

Oxford English vocab.      Оксфордский английский словарь.