1. of or relating to heliography; produced by or involving the use of sunlight or solar radiation
Usage: technical; chiefly historical in photography and printing contexts
2. of or relating to the sun's position or movement; solar
Usage: technical; astronomy and geography

Examples

• The heliographic process was an early photographic technique that relied on the sun's rays to create images.
• Heliographic surveys helped map the Earth's surface using solar-powered instruments.
• The heliographic method of printing involved exposing light-sensitive materials to sunlight.
• Ancient astronomers made heliographic observations to track the sun's apparent movement across the sky.
• The museum displayed heliographic prints from the 19th century, showing the technique's historical importance.