noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any representation (map projection) of part of a sphere on a plane surface.
2. 2
   A map constructed by stereographic projection, as described in Ptolemy's treatise Planisphaerium and later used in planispheric astrolabes
3. 3
   A map of the whole world, especially those from the 16th–17th century
4. 4
   Any of several charts of the celestial sphere having an overlay or window that may be adjusted to show the stars visible at a particular time, or from a particular place.

Synonyms

All synonyms

hemispherehemisphere

Example

More examples

"What projection is this planisphere in?"

Etymology

From plani- + sphere or plani- + -sphere.

Related phrases

celestial sphere

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.