from
The Collaborative International Dictionary of English v.0.48
Heliographic \He`li*o*graph"ic\
(h[=e]`l[i^]*[-o]*gr[a^]f"[i^]k), a. (Astron.)
1. Of or pertaining to a description of the sun.
[Webster 1913 Suppl.]
Note: Heliographic longitudes and latitudes of spots on the
sun's surface are analogous to geographic longitudes
and latitudes of places on the earth.
[Webster 1913 Suppl.]
2. Of or pertaining to heliography or a heliograph; made by
heliography.
[1913 Webster]
{Heliographic chart}. See under {Chart}.
[1913 Webster]