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)

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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)
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