Bible Dictionaries
Metemptosis

Webster's Dictionary

(n.) 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 bissextile day once in 134 years. The opposite to this is the proemptosis, or the addition of a day every 330 years, and another every 2,400 years.

Bibliography Information
Webster, Noah. Entry for 'Metemptosis'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​m/metemptosis.html. 1828.