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planisphaerium

planisphaerium [1 planus+sphaera+-ium] , (astr.) planisphere, map formed by projection of a sphere, esp. part of celestial sphere, on to a plane. Albion ad instar planisperii tocius spere celestis concentricos, ecentricos et eciam epiciclos pro variis stellarum motibus machinatos ‥ continet Wallingf. Alb. 294.

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