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vertical circle

noun, Astronomy.
1.
a great circle on the celestial sphere passing through the zenith.
Origin of vertical circle
1550-1560
First recorded in 1550-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for vertical circle
Historical Examples
  • A vertical circle is any great circle that passes through the zenith.

    A Text-Book of Astronomy George C. Comstock
  • Reflection from an excess of horizontal prisms gives rise to a vertical circle passing through the sun.

  • The altitude of a celestial object is its distance above the horizon measured on the arc of a vertical circle.

  • The Azimuth of a star is the angle between the meridian and the vertical circle passing through the star.

    A Text-Book of Astronomy George C. Comstock
  • The meridian is that vertical circle which passes through the north and south points.

    Letters on Astronomy Denison Olmsted
  • The prime vertical is that vertical circle which passes through the east and west points.

    Letters on Astronomy Denison Olmsted
  • The altitude of a body is its elevation above the horizon, measured on a vertical circle.

    Letters on Astronomy Denison Olmsted
  • The azimuth of a body is its distance, measured on the horizon, from the meridian to a vertical circle passing through that body.

    Letters on Astronomy Denison Olmsted
  • The amplitude of a body is its distance, on the horizon, from the prime vertical to a vertical circle passing through the body.

    Letters on Astronomy Denison Olmsted
  • The zenith distance of a body is measured on a vertical circle passing through that body.

    Letters on Astronomy Denison Olmsted
British Dictionary definitions for vertical circle

vertical circle

noun
1.
(astronomy) a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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vertical circle in Science
vertical circle  
A great circle on the celestial sphere that passes through the zenith and the nadir and thus is perpendicular to the horizon.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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