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heliogram
 

Definitions from WordNet

Noun heliogram has 1 sense
  1. heliogram - a message transmitted by means of the sun's rays
    --1 is a kind of     message

Definitions from the Web

Heliogram

A heliogram refers to a message or signal that is transmitted using sunlight or a mirror.

Example Sentences:

  1. The explorers used heliograms to communicate with the rescue team.
  2. The prisoners in the war camp sent secret heliograms to their families.
  3. He was able to send a heliogram from the wilderness, alerting authorities to his location.

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