electrograph

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An electrically produced graph or tracing.
2. n. Equipment used to produce such a graph or tracing in facsimile transmission.

Century Dictionary and Cyclopedia

1. n. A curve automatically traced and forming a continuous record of the indications of an electrometer.
2. n. An apparatus for engraving the copper cylinders used in printing fabrics and wall-papers. The cylinder is first coated with varnish, which is scratched by diamond-points traversing upon it, and controlled by circuit-breakers, that are in turn controlled by the copyist. The exposed portions are then etched by exposure to an acid-bath.
3. n. In photography, a photograph of an electric spark. See the extract.
4. n. An instrument for the continuous recording of atmospheric electricity.

Wiktionary

1. n. A mark, record, or tracing made by the action of electricity.

GNU Webster's 1913

1. n. A mark, record, or tracing, made by the action of electricity.
2. n. An apparatus, controlled by electric devices, used to trace designs for etching.
3. n. archaic An instrument for the reproduction at a distance of pictures, maps, etc., by means of electricity.
4. n. archaic An image made by the Röntgen rays; a sciagraph.
5. n. archaic A cinematograph using the arc light.

WordNet 3.0

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