heliograph [ hee-lee- uh-graf, -grahf] noun a device for signaling by means of a movable mirror that reflects beams of light, especially sunlight, to a distance. . Meteorology an instrument for recording the duration and intensity of sunshine. . Photography, Printing an early type of photoengraving made on a metal plate coated with sensitized asphalt. verb (used with or without object) to communicate by heliograph. Origin of heliograph
First recorded in
-graph Related forms he·li·og·ra·pher , [hee-lee- og-r uh-fer] /ˌhi liˈɒg rə fər/ noun he·li·o·graph·ic , [hee-lee- uh- graf-ik] /ˌhi li əˈgræf ɪk/ he·li·o·graph·i·cal, adjective he·li·o·graph·i·cal·ly, adverb he·li·og·ra·phy, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for heliograph flare
guidepost Examples from the Web for heliograph Historical Examples of heliograph
Instantly, the ship shone like the polished mirror of a
He had also been corroborated by a man who had seen the man who took it down from the
heliograph would be useless in stormy weather or in fog.
The Hussars left behind a Colt-Maxim and a
heliograph for our usage.
If there is no sun I cannot
heliograph and I have a host of signals to look up and get ready. British Dictionary definitions for heliograph noun an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays a device used to photograph the sun Derived Forms heliographer ( ˌhiːlɪˈɒɡrəfə), noun heliographic ( ˌhiːlɪəʊˈɡræfɪk) or heliographical, adjective heliography, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for 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