Heliograph

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Heliograph \He"li*o*graph\ (h[=e]"l[i^]*[-o]*gr[.a]f), n.
     [Helio- + -graph.]
     [1913 Webster]
     1. A picture taken by heliography; a photograph.
        [1913 Webster]
  


     2. An instrument for taking photographs of the sun.
        [1913 Webster]
  
     3. An apparatus for telegraphing by means of the sun's rays.
        See {Heliotrope}, 3.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Heliograph \He"li*o*graph\ (h[=e]"l[i^]*[-o]*gr[.a]f), v. t.
     1. To telegraph, or signal, with a heliograph.
        [Webster 1913 Suppl.]
  
     2. To photograph by sunlight.
        [Webster 1913 Suppl.]

From WordNet (r) 2.0 [wn]:

  heliograph
       n : an apparatus for sending telegraphic messages by using a
           mirror to turn the sun's rays off and on
       v : signal by means of a mirror and the using the sun's rays