Mét'emp-tō'sis, n.

(84), n. [Gr. μετά, beyond, after, and ἔμπτωσις, a falling upon, from ἐμπίπτειν, to fall in or upon, from ἐν, in, and πίπτειν, to fall; Fr. métémptose.] (Chron.) The solar equation necessary to prevent the new moon from happening a day too late, or the suppression of the bissextile 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.