Synonyms and Antonyms for heliograph
1. heliograph (n.)
an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
2. heliograph (v.)
signal by means of a mirror and the using the sun's rays
an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
signal by means of a mirror and the using the sun's rays
