#light_microscope__lightmicroscope  microscope consisting of an optical instrument that magnifies the image of an object
  supertype:  microscope  magnifier of the image of small objects; "the invention of the microscope led to the discovery of the cell"
  subtype:  binocular_microscope  compound_microscope  simple_microscope  ultramicroscope
  part:  eyepiece__ocular  combination of lenses at the viewing end of optical instruments
     part:  reticle__graticule  a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument
        part:  cross_hair__crosshair__cross_wire__crosswire  either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration; "he had the target in his cross hairs"

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