Definitions for: Heliograph

[n] an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
[v] signal with a heliograph

Webster (1913) Definition: He"li*o*graph, v. t.
1. To telegraph, or signal, with a heliograph.

2. To photograph by sunlight.

See Also: apparatus, setup, sign, signal, signalise, signalize