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heliograph

[hee-lee-uh-graf, -grahf] /ˈhi li əˌgræf, -ˌgrɑf/
noun
1.
a device for signaling by means of a movable mirror that reflects beams of light, especially sunlight, to a distance.
2.
Astronomy, photoheliograph.
3.
Meteorology. an instrument for recording the duration and intensity of sunshine.
4.
Photography, Printing. an early type of photoengraving made on a metal plate coated with sensitized asphalt.
verb (used with object), verb (used without object)
5.
to communicate by heliograph.
Origin
1815-1825
1815-25; helio- + -graph
Related forms
heliographer
[hee-lee-og-ruh-fer] /ˌhi liˈɒg rə fər/ (Show IPA),
noun
heliographic
[hee-lee-uh-graf-ik] /ˌhi li əˈgræf ɪk/ (Show IPA),
heliographical, adjective
heliographically, adverb
heliography, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for helio graphed

heliograph

/ˈhiːlɪəʊˌɡrɑːf; -ˌɡræf/
noun
1.
an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays
2.
a device used to photograph the sun
Derived Forms
heliographer (ˌhiːlɪˈɒɡrəfə) noun
heliographic (ˌhiːlɪəʊˈɡræfɪk), heliographical, adjective
heliography, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for helio graphed

heliograph

n.

product of a certain type of engraving process, 1853, from helio- + -graph "something written." Earlier, "a description of the sun" (1706, implied in heliographic). Heliography (1845 in the engraving sense) also (1840) was an early term for what came to be called photography.

Online Etymology Dictionary, © 2010 Douglas Harper
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