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orrery |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Orrery \Or"re*ry\, n.; pl {Orreries}. [So named in honor of the Earl of Orrery.] An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system. From WordNet r 1.6 [wn]: orrery n : an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock
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