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heliograph

Definition of heliograph (English)

noun

  1. an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
    sumber: wordnet30
  2. A picture taken by heliography; a photograph.
    sumber: webster1913

verb

  1. signal by means of a mirror and the using the sun's rays
    sumber: wordnet30
  2. To telegraph, or signal, with a heliograph.
    sumber: webster1913