The Collaborative International Dictionary of English v.0.48:

Electrograph \E*lec"tro*graph\, n. [Electro- + -graph.]
   1. A mark, record, or tracing, made by the action of
      electricity.
      [1913 Webster]

   2. An apparatus, controlled by electric devices, used to
      trace designs for etching.
      [Webster 1913 Suppl.]

   3. An instrument for the reproduction at a distance of
      pictures, maps, etc., by means of electricity. [archaic]
      [Webster 1913 Suppl.]

   4. An image made by the R["o]ntgen rays; a sciagraph.
      [archaic]
      [Webster 1913 Suppl.]

   5. A cinematograph using the arc light. [archaic]
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Cinematograph \Cin`e*mat"o*graph\, n. [Gr. ?, ?, motion +
   -graph.]
   1. an older name for a movie projector, a machine,
      combining magic lantern and kinetoscope features, for
      projecting on a screen a series of pictures, moved rapidly
      (25 to 50 frames per second) and intermittently before an
      objective lens, and producing by persistence of vision the
      illusion of continuous motion; a moving-picture projector;
      also, any of several other machines or devices producing
      moving pictorial effects. Other older names for the movie
      projector are animatograph, biograph, bioscope,
      electrograph, electroscope, kinematograph,
      kinetoscope, veriscope, vitagraph, vitascope,
      zoogyroscope, zoopraxiscope, etc.

            The cinematograph, invented by Edison in 1894, is
            the result of the introduction of the flexible film
            into photography in place of glass.   --Encyc. Brit.
      [Webster 1913 Suppl.]

   2. A camera for taking chronophotographs for exhibition by
      the instrument described above.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

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