Heliograph
Heliograph noun - An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.
Show all Definitions
Synonyms for Heliograph
Warning and heliograph are semantically related. In some cases you can use "Warning" instead a noun "Heliograph".
Warning
Warning noun - The act or an instance of telling beforehand of danger or risk.
Show all Definitions
Synonyms for Warning
Heliograph and warning are semantically related. Sometimes you can use "Heliograph" instead a noun "Warning".
Cite this Source
Warning and Heliograph. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/heliograph/warning
Heliograph & Warning. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/heliograph/warning>.
Warning or Heliograph. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/heliograph/warning.
Google Ngram Viewer shows how "heliograph" and "warning" have occurred on timeline