heliograph ( synonym found)
Definition of heliograph:

°An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
°A heliogram.
°To send a message by heliograph.
°To send a heliograph.
Definition of heliograph:

°An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
°A heliogram.
°To send a message by heliograph.
°To send a heliograph.
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