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1. A device for transmitting messages by reflecting sunlight.
2. A device capable of imaging the surface and outer regions of the sun.
v. he·li·o·graphed, he·li·o·graph·ing, he·li·o·graphs
To send (a message) by heliograph.
To send a heliograph.

he′li·og′ra·pher (-ŏg′rə-fər) n.
he′li·o·graph′ic adj.
he′li·og′ra·phy (-ŏg′rə-fē) n.
References in periodicals archive ?
Since mythical Kemet is placed as the starting point from where Africans first originated, a full program attending to the study of heliographic scribes becomes paramount for the full appreciation of this starting point.
The archeological remains feature Heliographic carvings of his names and titles.
The 4-inch heliographic telescope at SAAO in Cape Town, erected in 1876, is used to view sunspots.
Solar wind and helium abundance as a function of speed and heliographic latitude: Variation through a solar cycle.
23) The solar wind speeds from Ulysses and IPS measurements are plotted as a function of heliographic latitude in the figure.
The artistic expeditions and heliographic missions which took place in Europe in the 1850's had an influence on the new medium of photography and Clifford was no doubt aware of this fact.
These assist in determining the heliographic latitude and longitude of sunspots.