Table of Contents
Synonyms
Antonyms
Etymology
1. heliograph
noun. an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.
Synonyms
- apparatus
Antonyms
- negativeness
- positiveness
Etymology
- -graph (English)
- helio- (English)
Featured Games
2. heliograph
verb. signal by means of a mirror and the using the sun's rays.
Synonyms
- sign
- signal
- signalise
Antonyms
- positivity
- invalidate
- uncommunicative
- unimpressive
Etymology
- -graph (English)
- helio- (English)