Word Explorer
Heliograph
An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
📖 Definitions of "Heliograph"
noun
- 1
An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
- 2
A heliogram.
- 3
An instrument for measuring the intensity of sunlight.
- 4
A device for photographing the sun.
verb
- 1
To send a message by heliograph.
- 2
To send a heliograph.
- 3
To photograph by sunlight.
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