heliograph heliogram • heliographer · · · Info · Definitions · Characters · · heliograph · · Text Latin · · Script 10 · · Length 3 · · Syllables Definitions · · · (noun) an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on. · · Noun Definition 1 (verb) signal by means of a mirror and the using the sun's rays. · · Verb Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072