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metemptosis

Metemptosis is a 11 letter word which starts with the letter M and ends with the letter S for which we found 1 definitions.

Definition
(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 2400 years.
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