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planetariumPLANETA'RIUM, n. An astronomical machine which, by the movement of its parts, represents the motions and orbits of the planets, agreeable to the Copernican system. |
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planetariumPLANETA'RIUM, n. An astronomical machine which, by the movement of its parts, represents the motions and orbits of the planets, agreeable to the Copernican system. |