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.
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Origin of meridian circle
First recorded in 1540–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for meridian circle
Was he not drowsing over his eyepiece in the meridian-circle room?The Man Who Rocked the Earth|Arthur Train
British Dictionary definitions for 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