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planisphere

 - 2 dictionary results

plan⋅i⋅sphere

[plan-uh-sfeer, pley-nuh-]
–noun
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.

Origin:
1350–1400; plani- + sphere; r. ME planisperie < ML plānisphaerium


plan⋅i⋅spher⋅i⋅cal [plan-uh-sfer-i-kuhl, -sfeer-, pley-nuh-] , plan⋅i⋅spher⋅ic, plan⋅i⋅spher⋅al [plan-i-sfeer-uhl, pley-nuh-] , noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To planisphere
pla·ni·sphere   (plā'nĭ-sfîr')   
n.  
  1. A representation of a sphere or part of a sphere on a plane surface.

  2. Astronomy A polar projection of half or more of the celestial sphere on a chart equipped with an adjustable overlay to show the stars visible at a particular time and place.

pla'ni·spher'ic (-sfîr'ĭk, -sfěr'-), pla'ni·spher'i·cal (-ĭ-kəl) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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