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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
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Origin of HELIOGRAPH

International Scientific Vocabulary
First Known Use: 1877

Rhymes with HELIOGRAPH

cardiograph, choreograph, ideograph, mimeograph, oscillograph, pseudepigraph, radiograph

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