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From: Webster's Revised Unabridged Dictionary (1913)

 As·tro·nom·ic·al a.  Of or pertaining to astronomy; in accordance with the methods or principles of astronomy.  -- As*tro*nom*ic*al*ly, adv.
 Astronomical clock. See under Clock.
 Astronomical day. See under Day.
 Astronomical fractions, Astronomical numbers. See under Sexagesimal.
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