Definition, Meaning & Synonyms

heliograph

Noun

/ˈhiːliəʊɡrɑːf/

Definition

A device used for signaling or sending messages using sunlight.

Examples

The scientist used a heliograph to send a message over long distances.
During the military operation, the team relied on a heliograph for silent communication.
In the early days of surveying, a heliograph was essential for relaying information from one location to another.

Meaning

The term heliograph is derived from Greek roots, where ‘helio’ means sun and ‘graph’ means to write or draw. Therefore, it refers to a method of communicating using reflected sunlight.