The Collaborative International Dictionary of English v.0.48:

Chrysotype \Chrys"o*type\, n. [Gr. chryso`s gold + -type.]
   1. A photographic picture taken upon paper prepared by the
      use of a sensitive salt of iron and developed by the
      application of chloride of gold. --Abney.
      [1913 Webster]

   2. 2process, invented by Sir J.Herschel.
      [1913 Webster]