Dictionary

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
ADVERTISEMENT

Origin of HELIOGRAPH

International Scientific Vocabulary
First Known Use: 1877

Browse

Next Word in the Dictionary: heliographicPrevious Word in the Dictionary: heliogramAll Words Near: heliograph
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears