apsidal motion

noun Astronomy.

the rotation of the major axis of an eccentric orbit in the plane of the orbit.

Nearby words

  1. après-midi d'un faune, l',
  2. après-ski,
  3. apsaras,
  4. apse,
  5. apsidal,
  6. apsides,
  7. apsidiole,
  8. apsis,
  9. apsu,
  10. apsyrtus

Origin of apsidal motion

First recorded in 1955–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019