planisphere

• POS: Noun
• HYPHEN: plan=i=sphere

CIDE DICTIONARY

planisphere, 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.  [1913 Webster]

OXFORD DICTIONARY

planisphere, n. a map formed by the projection of a sphere or part of a sphere on a plane, esp. to show the appearance of the heavens at a specific time or place.

Derivative

planispheric adj.

Etymology

ME f. med.L planisphaerium (as PLANE(1), SPHERE): infl. by F planisph{egrave}re