Dictionary

heliograph

heliograph

noun he·lio·graph \-ˌgraf\

Definition of HELIOGRAPH

:  an apparatus for telegraphing by means of the sun's rays flashed from a mirror
heliograph transitive verb

Origin of HELIOGRAPH

International Scientific Vocabulary
First Known Use: 1877

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March 06, 2015
eolian Hear it
Deposited, produced, or eroded by wind
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