Reference meaning

orrery

noun·Reference

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planetarium consisting of 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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This definition is reproduced from Princeton WordNet 3.0, sense 03856465-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.