Source : Webster's Revised Unabridged Dictionary (1913)

Siderealize \Si*de"re*al*ize\, v. t.
   To elevate to the stars, or to the region of the stars; to
   etherealize.

         German literature transformed, siderealized, as we see
         it in Goethe, reckons Winckelmann among its initiators.
                                                  --W. Pater.