Precessional

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pre·ces·sion (pr

-s

1. The act or state of preceding; precedence.

2. Physics The motion of the axis of a spinning body, such as the wobble of a spinning top, when there is an external force acting on the axis.

3. Astronomy

a. Precession of the equinoxes.

b. A slow gyration of the earth's axis around the pole of the ecliptic, caused mainly by the gravitational pull of the sun, moon, and other planets on the earth's equatorial bulge.

[Late Latin praecessi, praecessin-, from Latin praecessus, past participle of praecdere, to go before; see precede.]

pre·cession·al adj.

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Precessional