Meaning heliograph
What does heliograph mean? Here you find 3 meanings of the word heliograph. You can also add a definition of heliograph yourself
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heliograph1848, "instrument for taking photographs of the sun," from helio- "sun" + -graph "something written." Earlier, "a description of the sun" (1706, implied in heli [..]
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heliographAn instrument that records the duration of sunshine and gives a qualitative measure of the amount of sunshine by the action of the sun's rays upon blueprint paper; a type of sunshine recorder.
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heliograph(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
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