Heliograph
Pronunciation : He"li*o*graph
Part of Speech : n.
Etymology : [Helio- + -graph.]
Definition : 1. A picture taken by heliography; a photograph.
2. An instrument for taking photographs of the sun.
3. An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.
Source : Webster's Unabridged Dictionary, 1913