Perigean :: Perigean (a.) Pertaining to the perigee.

Perigee :: Perigee (n.) Alt. of Perigeu.

Perigenesis :: Perigenesis (n.) A theory which explains inheritance by the transmission of the type of growth force possessed by one generation to another.

Perigenetic :: Perigenetic (a.) Of or pertaining to perigenesis.

Perigeum :: Perigeum (n.) That point in the orbit of the moon which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of other orbits, as of a comet, a planet, etc. Called also epigee, epigeum..

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