The Collaborative International Dictionary of English v.0.48:

Microscopy \Mi*cros"co*py\, n.
   The use of the microscope; investigation with the microscope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

microscopy
    n 1: research with the use of microscopes

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "microscopy":
   electron microscopy, electron optics, infrared spectroscopy,
   microbiology, micrography, microphotography, microphysics,
   microscopics, microspectroscopy, optical physics, optics,
   optometry, photography, spectrometry, spectrophotometry,
   spectroscopy, stereoscopy, telescopy