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Definition of Heliograph
1. Verb. Signal by means of a mirror and the using the sun's rays.
2. Noun. An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.
Definition of Heliograph
1. n. A picture taken by heliography; a photograph.
2. v. t. To telegraph, or signal, with a heliograph.
Definition of Heliograph
1. Noun. An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight. ¹
2. Noun. A heliogram. ¹
3. Noun. An instrument for measuring the intensity of sunlight. ¹
4. Noun. A device for photographing the sun. ¹
5. Noun. (obsolete) A photograph. ¹
6. Verb. (transitive) To send a message by heliograph. ¹
7. Verb. (intransitive) To send a heliograph. ¹
¹ Source: wiktionary.com
Definition of Heliograph
1. [v -ED, -ING, -S]
Medical Definition of Heliograph
1. Origin: Helio- + -graph 1. A picture taken by heliography; a photograph. 2. An instrument for taking photographs of the sun. 3. An apparatus for telegraphing by means of the sun's rays. See Heliotrope. Source: Websters Dictionary (01 Mar 1998)