meridian circle

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:
1540–50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Meridian circle is always a great word to know.
So is red giant. Does it mean:
the boundary around a black hole on and within which no matter or radiation can escape
a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue
Collins
World English Dictionary
meridian circle
 
n
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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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