GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Galactic , a. [Gr.  milky, fr. , , milk. See Galaxy, and cf. Lactic.]
   Of or pertaining to milk; got from milk; as, galactic acid.
   1913 Webster
   Of or pertaining to the galaxy or Milky Way.
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   Galactic circle (Astron.), the great circle of the heavens, to which the course of the galaxy most nearly conforms. Herschel. -- Galactic poles, the poles of the galactic circle.
   1913 Webster