جستجو
Heliograph
01
خورنگار, آینه آفتابی
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
هلیوگرافی کردن, با هلیوگراف علامت دادن
signal by means of a mirror and the using the sun's rays
heliograph
n
