PLANISPHERE

planisphere. Planisphere, n. a sphere projected upon a plain

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Plan″i‐sphere (?), n. [[Plani- + sphere: cf. F. planisphère. See Plain, and Sphere.]] The representation of the circles of the sphere upon a plane; especially, a representation of the celestial sphere upon a plane with adjustable circles, or other appendages, for showing the position of the heavens, the time of rising and setting of stars, etc., for any given date or hour.