Heliograph
volume
British pronunciation/hˈɛlɪˌɒɡɹaf/
American pronunciation/hˈɛlɪˌɑːɡɹæf/

تعريف ومعنى "heliograph"

Heliograph
01

a device used for signaling over long distances using sunlight and a mirror, in which the mirror is used to reflect sunlight in a coded pattern to convey messages

to heliograph
01

تحديد باستخدام الهليوغراف

signal by means of a mirror and the using the sun's rays
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