• synonyms

apsidal motion

See more synonyms for apsidal motion on Thesaurus.com
noun Astronomy.
  1. the rotation of the major axis of an eccentric orbit in the plane of the orbit.
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Origin of apsidal motion

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018