Precession

n. precedence; priority, antecedence; progress, advancement

Precession refers to a change in the direction of the axis of a rotating object. In physics, there are two types of precession, torque-free and torque-induced, the latter being discussed here in more detail. In certain contexts, "precession" may refer to the precession that the Earth experiences, the effects of this type of precession on astronomical observation, or to the precession of orbital objects.
See more at Wikipedia.org...

Noun
1. the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
(hypernym) motion
2. the act of preceding in time or order or rank (as in a ceremony)
(synonym) precedence, precedency
(hypernym) activity
(derivation) precede, predate

n. precession, precedence

(n.)
The act of going before, or forward.