The Collaborative International Dictionary of English v.0.48:

Sciagraph \Sci"a*graph\, n. [See Sciagraphy.]
   1. (Arch.) An old term for a vertical section of a building;
      -- called also sciagraphy. See Vertical section, under
      Section.
      [1913 Webster]

   2. (Phys.) A radiograph. [Written also skiagraph.]
      [1913 Webster]