heliograph

This is not a dictionary! - Search for "heliograph" in The Danish Dictionary

• February 28. 2016 from wordnet.princeton.edu

  heliograph — noun — english

  an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

• March 22. 2016 from wordnet.princeton.edu

  heliograph — verb — english

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