What is Heliographic?

Heliographic definition and meaning on Dictionary terms:
a device for signaling by means of a movable mirror that reflects beams of light, especially sunlight, to a distance.
Astronomy. photoheliograph.
Meteorology. an instrument for recording the duration and intensity of sunshine.
Photography, Printing. an early type of photoengraving made on a metal plate coated with sensitized asphalt.

verb (used with or without object)
to communicate by heliograph.


reference: www.dictionary.com/browse/heliographic