01 a. Of or pertaining to the megascope or the projection upon a screen of images of opaque objects.
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1.
Of or pertaining to the megascope or the projection upon a screen of images of opaque objects.(Physics)
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2.
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.(Geol.)