Home › Words › M › metemptosismetemptosismetemptosis means the suppression of a day in the calendar to prevent the date of the new moon being set a day too late, or the suppression of the leap day once in 134 years.Among words judged in Lexicurio's Arena, metemptosis ranks #13,883 of 42,752 for Qualifying.EtymologyLearned borrowing from Ancient Greek μετέμπτωσις (metémptōsis), from μετεμπίπτω (metempíptō).nounThe suppression of a day in the calendar to prevent the date of the new moon being set a day too late, or the suppression of the leap day once in 134 years.Definitions & examples from Wiktionary (CC BY-SA 3.0).