that part of the precession of the equinoxes which depends on the action of the planets alone.
See also: Precession
planetary precession
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.