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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How to use meridian circle in a sentence
Through a slot in this post passes a graduated meridian circle within which the globe ball revolves.
The meridian circle of iron, likewise, is not graduated, and like the wooden base is not a part of the original mounting.
Through this horizon circle passes an adjustable meridian circle 39 cm.
Its meridian circle is a comparatively recent and very clumsy substitute of wood for the original which doubtless was of brass.
The meridian circle of wood, within which the sphere is made to revolve, is graduated.
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