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meridian circle

noun, Astronomy.
a transit instrument provided with a graduated vertical scale, used to measure the declinations of heavenly bodies and to determine the time of meridian transits.
Origin of meridian circle
1540-50 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for meridian-circle

meridian circle

an instrument used in astronomy for determining the declination and right ascension of stars. It consists of a telescope attached to a graduated circle
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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