Source : Webster's Revised Unabridged Dictionary (1913)

Electrograph \E*lec"tro*graph\, n. [Pref. electro + -graph.]
   1. An apparatus, controlled by electric devices, used to
      trace designs for etching.

   2. An instrument for the reproduction at a distance of
      pictures, maps, etc., by means of electricity.

   3. An image made by the R["o]ntgen rays; a sciagraph.

   4. A cinematograph using the arc light.

Electrograph \E*lec"tro*graph\, n. [Electro- + -graph.]
   A mark, record, or tracing, made by the action of
   electricity.

Source : WordNet®

electrograph
     n 1: an apparatus for the electrical transmission of pictures
     2: electrical device used for etching by electrolytic means