\Mi`cro*pho"to*graph\, n. [Micro- + photograph.]
1. A microscopically small photograph of a picture, writing,
   printed page, etc.
2. An enlarged representation of a microscopic object,
   produced by throwing upon a sensitive plate the magnified
   image of an object formed by a microscope or other
   suitable combination of lenses.
Note: A picture of this kind is preferably called a
      photomicrograph.