heliograph

noun
he·​lio·​graph | \ ˈhē-lē-ō-ˌgraf How to pronounce heliograph (audio) \

Definition of heliograph

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

Other Words from heliograph

heliograph transitive verb

First Known Use of heliograph

1877, in the meaning defined above

History and Etymology for heliograph

International Scientific Vocabulary

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The first known use of heliograph was in 1877

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Dictionary Entries Near heliograph

heliogram

heliograph

heliographic

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Cite this Entry

“Heliograph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heliograph. Accessed 27 Sep. 2021.

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More from Merriam-Webster on heliograph

Britannica.com: Encyclopedia article about heliograph

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