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1 heliograph

An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.

Roget 550: indication; symbolism, symbolization; semiology, semiotics, semeiology, semeiotics; Zeitgeist.    [means of recognition: property] characteristic, diagnostic; lineament, feature, ... show more

Roget 556: painting; depicting; drawing etc. v.; design; perspective, sciagraphy, skiagraphy; chiaroscuro etc. (light) 420; composition; ... show more

Dutch: heliograaf


1 heliograph

Signal by means of a mirror and the using the sun's rays.

Find more on heliograph elsewhere: etymology - rhymes - Wikipedia.

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