apsis: Meaning and Definition of

ap•sis

Pronunciation: (ap'sis), [key]
— pl. -si•des
  1. either of two points in an eccentric orbit, onefarthest from the center of attraction, the othernearest to the center of attraction.
  2. an apse.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
apsidiole Ap star
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