• Heliograph Definition & Synonyms

  1. (n.) A picture taken by heliography; a photograph.
  2. (n.) An apparatus for telegraphing by means of the suns rays. See Heliotrope, 3.
  3. (n.) An instrument for taking photographs of the sun.
  4. (v. t.) To photograph by sunlight.
  5. (v. t.) To telegraph, or signal, with a heliograph.

• Heliographic Definition & Synonyms

  1. (a.) Of or pertaining to heliography or a heliograph; made by heliography.
  2. (a.) Of or pertaining to a description of the sun.

• Heliography Definition & Synonyms

  1. (n.) Photography.
  2. (n.) The description of the sun.
  3. (n.) An early photographic process invented by Nicephore Niepce, and still used in photo-engraving. It consists essentially in exposing under a design or in a camera a polished metal plate coated with a preparation of asphalt, and subsequently treating the plate with a suitable solvent. The light renders insoluble those parts of the film which is strikes, and so a permanent image is formed, which can be etched upon the plate by the use of acid.
  4. (n.) The system, art, or practice of telegraphing, or signaling, with the heliograph.