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Thesaurus: heliographs
n an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on v signal by means of a mirror and the using the sun's rays
Related headwords
mirrordefinitionraysdefinitionapparatusdefinitionmeansdefinitionmessagesdefinitionsendingdefinitionsignaldefinitiontelegraphicdefinitionturndefinitionheliocentric parallaxfamilyheliocentricalfamilyheliochromefamilyheliochromicfamilyheliochromyfamilyheliogramfamilyheliographfamilyheliographedfamilyheliographicfamilyheliographingfamilyheliographyfamilyheliogravurefamilyheliolaterfamilyheliolatryfamilyheliolitefamilyheliometerfamilyheliometricfamilyheliometricalfamilyheliometryfamily