pla·​ni·​sphere | \ ˈplā-nə-ˌsfir How to pronounce planisphere (audio) \

Definition of planisphere

: a representation of the circles of the sphere on a plane especially : a polar projection of the celestial sphere and the stars on a plane with adjustable circles or other appendages for showing celestial phenomena for any given time

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Other Words from planisphere

planispheric \ ˌplā-​nə-​ˈsfir-​ik How to pronounce planisphere (audio) , -​ˈsfer-​ How to pronounce planisphere (audio) \ adjective

Examples of planisphere in a Sentence

Recent Examples on the Web Monthly sky maps take the place of a planisphere in this atlas, which covers both the northern and southern hemisphere. Popular Science, "Beautiful night-sky maps for any aspiring astronomer," 13 Sep. 2019 Kids can craft their own planispheres and play games about the night sky. Sara Cagle, Los Angeles Times, "Celebrating heritage, surfing and anime at weekend events near L.A.," 31 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'planisphere.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of planisphere

14th century, in the meaning defined above

History and Etymology for planisphere

alteration of Middle English planisperie, from Medieval Latin planisphaerium, from Latin planum plane + sphaera sphere

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Time Traveler for planisphere

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The first known use of planisphere was in the 14th century

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Cite this Entry

“Planisphere.” Dictionary, Merriam-Webster, Accessed 18 Jan. 2021.

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