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astronomical clock

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noun

a clock indicating or representing the movements of the sun or planets, the phases of the moon, or the sky visible at a given time, used as a means of establishing time or for additional information, as locating celestial bodies or timing their movement.
a clock used for observing the apparent time of the meridian passages of heavenly bodies.

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Origin of astronomical clock

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for astronomical clock

astronomical clock

noun

a complex clock showing astronomical phenomena, such as the phases of the moon
any clock showing sidereal time used in observatories
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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