'Heliograph' definitions:
Definition of 'heliograph'
(from WordNet)
noun
An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
verb
Signal by means of a mirror and the using the sun's rays
Definition of 'Heliograph'
From: GCIDE
- Heliograph \He"li*o*graph\ (h[=e]"l[i^]*[-o]*gr[.a]f), n. [Helio- + -graph.] [1913 Webster]
- 1. A picture taken by heliography; a photograph. [1913 Webster]
- 2. An instrument for taking photographs of the sun. [1913 Webster]
- 3. An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3. [1913 Webster]
Definition of 'Heliograph'
From: GCIDE
- Heliograph \He"li*o*graph\ (h[=e]"l[i^]*[-o]*gr[.a]f), v. t.
- 1. To telegraph, or signal, with a heliograph. [Webster 1913 Suppl.]
- 2. To photograph by sunlight. [Webster 1913 Suppl.]