GNU Collaborative International Dictionary of English

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1.       
    Perigee (?), Perigeum (?),  n. [NL. perigeum, fr. Gr. περί about, near + γῆ the earth: cf. F. périgée.] (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]