{ , 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. [ Webster 1913 Suppl. ]

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. [ Webster 1913 Suppl. ]