Source : Webster's Revised Unabridged Dictionary (1913)

Astronomical \As`tro*nom"ic*al\ (-[i^]*kal), a. [L.
   astronomicus, Gr. 'astronomiko`s: cf. F. astronomique.]
   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}.