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transit circle

 - 2 dictionary results

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.
Also called circle, transit circle, transit instrument.

Origin:
1540–50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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