English Explanatory Dictionary

heliograph

English dictionary entry

Meanings

noun
  1. An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
  2. A heliogram.
  3. An instrument for measuring the intensity of sunlight.
  4. A device for photographing the sun.
  5. A photograph.
verb
  1. To send a message by heliograph.
  2. To send a heliograph.
  3. To photograph by sunlight.

Pronunciation

/ˈhiː.li.əˌɡɹæf/

Word forms

heliograph heliographs heliographing heliographed

Etymology

From helio- + -graph.

Derived words

heliographer heliographic heliography oroheliograph photoheliograph radioheliograph spectroheliograph
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