apsidal motion

noun Astronomy.

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

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Nearby words

après-midi d'un faune, l', après-ski, apsaras, apse, apsidal, apsidal motion, apsides, apsidiole, apsis, apsu, apsyrtus

Origin of apsidal motion

First recorded in 1955–60

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