ALL meanings of precessional
pre·ces·sion
P p - noun precessional the act or fact of preceding; precedence. 1
- noun precessional Mechanics. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the rotation axis describes a cone, with the vertical through the vertex of the body as axis of the cone, and the motion of the rotating body is perpendicular to the direction of the torque. 1
- noun precessional Astronomy. the slow, conical motion of the earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth. precession of the equinoxes. 1