vertical circle

noun

Definition of vertical circle

: a great circle of the celestial sphere whose plane is perpendicular to that of the horizon — see azimuth illustration

First Known Use of vertical circle

1559, in the meaning defined above

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The first known use of vertical circle was in 1559

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Cite this Entry

“Vertical circle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vertical%20circle. Accessed 3 Dec. 2020.

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