Source : Webster's Revised Unabridged Dictionary (1913)

Macroscopic \Mac`ro*scop"ic\, Macroscopical \Mac`ro*scop"ic*al\,
   a. [Macro- + Gr. ? to view.]
   Visible to the unassisted eye; -- as opposed to
   {microscopic}. -- {Mac`ro*scop"ic*al*ly}, adv.

Source : WordNet®

macroscopically
     adv : without using a microscope; "The tubes were examined
           macroscopically"