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heliograph

he·li·o·graph / ˈhēlēəˌgraf/ • n. 1. a signaling device by which sunlight is reflected in flashes from a movable mirror. ∎  a message sent in such a way; a heliogram. 2. a telescopic apparatus for photographing the sun. 3. hist. a type of early photographic engraving made using a sensitized silver plate and an asphalt or bitumen varnish. • v. [tr.] 1. dated send (a message) by heliograph. 2. hist. take a heliographic photograph of. DERIVATIVES: he·li·o·graph·ic / ˌhēlēəˈgrafik/ adj. he·li·og·ra·phy / ˌhēlēˈägrəfē/ n.

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"heliograph." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"heliograph." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/heliograph-0

"heliograph." The Oxford Pocket Dictionary of Current English. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/heliograph-0

heliograph

heliograph (hē´lēəgrăf) [Gr.,=sun-writer], signaling device using flashes of sunlight. It has two mirrors that are used to reflect sunlight on a distant point and a shutter through which the sunlight passes so that messages may be transmitted in telegraphic code by means of long and short flashes. It was used in ancient times and as recently as the 19th cent. by the U.S. army in the SW United States and by the British army in India.

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"heliograph." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"heliograph." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/heliograph

"heliograph." The Columbia Encyclopedia, 6th ed.. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/heliograph

heliograph

heliographbarf, behalf, calf, chaff, coif, giraffe, Graf, graph, half, laugh, scarf, scrum half, staff, strafe, wing half •headscarf • mooncalf • bar graph •telegraph • polygraph • epigraph •serigraph • cardiograph • radiograph •spectrograph • micrograph •lithograph • heliograph •choreograph • tachograph •stylograph • holograph • seismograph •chronograph, monograph •phonograph • paragraph •cinematograph • pictograph •autograph • photograph • flagstaff •jackstaff • distaff • tipstaff • epitaph •pikestaff • cenotaph

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"heliograph." Oxford Dictionary of Rhymes. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"heliograph." Oxford Dictionary of Rhymes. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/heliograph

"heliograph." Oxford Dictionary of Rhymes. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/heliograph