microphotograph

micro- +‎ photograph

microphotograph (plural microphotographs)

1. A photograph so reduced in size that it must be viewed through a lens or a microscope.
   • 1962, UNESCO, UNESCO Bulletin for Libraries, volume 16:

     The advantages of the use of photographic reduction in recording documents are so obvious that it is not surprising that the first microphotograph was made shortly after the invention of photography [1-4].¹

   • 2007, Michael R. Peres, Focal Encyclopedia of Photography: Digital Imaging, Theory and Applications:

     Microphotograph slides, however, required an expensive microscope for viewing, which make them beyond the reach of the average person.

   • 2008, John Hannavy, editor, Encyclopedia of Nineteenth-Century Photography, volume 1:

     Dancer's first microphotograph, a daguerrotype of a 20 inches long document reduced to 3mm in length, was printed in 1839.

2. A photograph taken through a microscope, an enlarged picture of a very small item or area; a photomicrograph.

microphotograph (third-person singular simple present microphotographs, present participle microphotographing, simple past and past participle microphotographed)

1. To create such a photograph

• photomicrograph