— planispherical /plan'euh sfer"i keuhl, -sfear"-, play'neuh-/ , planispheric, planispheral /plan'i sfear"euhl, play'neuh-/ , adj.
/plan"euh sfear', play"neuh-/ , n.
1. a map of half or more of the celestial sphere with a device for indicating the part of a given location visible at a given time.
2. a projection or representation of the whole or a part of a sphere on a plane.
[ 1350-1400; PLANI- + SPHERE; r. ME planisperie planisphaerium ]