planetary precession


Also found in: Dictionary, Wikipedia.
Related to planetary precession: precession of the equinoxes, process

planetary precession

See precession.

planetary precession

[′plan·ə‚ter·ē pri′sesh·ən]
(astronomy)
A comparatively small eastward motion of the equinoxes caused by the action of other planets in altering the plane of the earth's orbit.