Per`i*ge"an(?), a. Pertaining to the perigee.
Perigean tides, those spring tides which occur soon after the moon passes her perigee.
Per`i*ge"um(?), } n. [NL. perigeum, fr. Gr. about, near + the earth: cf. F. prige.] (Astron.) That point, in the orbit of the moon or other body orbiting the earth, which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of bodies not orbiting the earth, such as of a comet, a planet, etc. Called also epigee, epigeum.
[1913 Webster +PJC]
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Fri 14th December 2018