Source : Webster's Revised Unabridged Dictionary (1913)

Microphotograph \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.