\Meg`a*scop"ic\, Megascopical \Meg`a*scop"ic*al\, a.
1. (Physics) Of or pertaining to the megascope or the
   projection upon a screen of images of opaque objects.
   (b) Enlarged or magnified; -- said of images or of
       photographic pictures, etc.
2. (Geol.) Large enough to be seen; -- said of the larger
   structural features and components of rocks which do not
   require the use of the microscope to be perceived. Opposed
   to {microscopic}.