See Also: planisphere(dictionary)

planisphere (iou)



planisphere noun. LME.
[medieval Latin planisphaerium, from Latin planus PLAIN adjective1 + sphaera, Greek sphaira SPHERE noun, in form infl. by French planisphere.]
A map, chart, or graduated scale formed by the projection of a sphere, or part of one, on a plane; esp. a polar projection of half (or more) of the celestial sphere, as in one form of astrolabe.
planispheric adjective of the nature of or pertaining to a planisphere M19.