spherograph

noun
sphero·​graph | \ ˈsfirəˌgraf, -fer-, -grȧf \

Definition of spherograph

1 : two cardboards used especially in navigation and astronomy, containing various circles, and turning upon each other in such a manner that any possible spherical triangle may be readily found and the measure of the parts read off by inspection
2 : a disk ruled with meridians and parallels in stereographic projection for the solution of problems in spherics

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History and Etymology for spherograph

sphaer- + -graph

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Cite this Entry

“Spherograph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spherograph. Accessed 28 Nov. 2020.

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