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Entry 5 senses · 2 variants Webster, 1913

Heliograph

/(hē"lĭ*ō̇*grȧf)/ · He·li·o·graph · IPA /ˈhiː.li.əˌɡɹæf/
01 n. A picture taken by heliography; a photograph.
  1. 1.
    A picture taken by heliography; a photograph.
  2. 2.
    An instrument for taking photographs of the sun.
  3. 3.
    An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3. See: Heliotrope
02 v. t. To telegraph, or signal, with a heliograph.
  1. 1.
    To telegraph, or signal, with a heliograph.
  2. 2.
    To photograph by sunlight.