Arti kata
heliograph
Definition of heliograph (English)
noun
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an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and onsumber: wordnet30
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A picture taken by heliography; a photograph.sumber: webster1913
verb
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signal by means of a mirror and the using the sun's rayssumber: wordnet30
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To telegraph, or signal, with a heliograph.sumber: webster1913