The act of carrying up or away; exaltation. (Obs.)
2.
(Astron.)
(a)
An inequality of the moon's motion in its orbit, due to the attraction of the sun, by which the equation of the center is diminished at the syzygies, and increased at the quadratures by about 1° 20´.
... The Evection, an irregular motion of the Moon discovered by Ptolemy, whereby her mean longitude is increased or diminished, was explained by Horrox as depending upon the libratory motion of the apsides, and the change which takes place in the ... — The Astronomy of Milton's 'Paradise Lost' • Thomas Orchard