Preceramic
adjective
1.
noting or pertaining to a period or culture antedating the use of ceramics or pottery.
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- Pre-ceremony
noun, plural ceremonies. 1. the formal activities conducted on some solemn or important public or state occasion: the coronation ceremony. 2. a formal religious or sacred observance; a solemn rite: a marriage ceremony. 3. formal observances or gestures collectively; ceremonial observances: The breathless messenger had no time for ceremony. 4. any formal act or observance, […]
- Precess
verb (used without object), Mechanics. 1. to undergo precession (def 2). verb 1. to undergo or cause to undergo precession
- Precession
noun 1. the act or fact of preceding; precedence. 2. 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 […]
- Precessional
noun 1. the act or fact of preceding; precedence. 2. 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 […]
- Precession-of-the-equinoxes
noun 1. the earlier occurrence of the equinoxes in each successive sidereal year because of the slow retrograde motion of the equinoctial points along the ecliptic, caused by the precession of the earth’s axis of rotation; a complete precession of the equinoxes requires about 25,800 years. 2. the resulting drift of celestial coordinates with respect […]