different between signalling vs heliography

signalling

English

Alternative forms

  • signaling (US)

Verb

signalling

  1. present participle of signal

Noun

signalling (countable and uncountable, plural signallings) (British spelling)

  1. the use of signals in communications, especially the sending of signals in telecommunications
  2. (rail transport) the signals and associated equipment required for their operation.

Derived terms

  • cab signalling

signalling From the web:

  • what signalling system
  • what is signalling theory
  • what's virtue signalling
  • what is signalling in economics
  • what are signalling molecules
  • what is signalling in railways
  • what is signalling in telecommunication
  • what are signalling pathways


heliography

English

Etymology

helio- +? -graphy

Pronunciation

  • Rhymes: -????fi

Noun

heliography (uncountable)

  1. The scientific study of the sun.
  2. The art of making a heliograph.
  3. The system of signalling by heliograph.
  4. (obsolete) Photography.

heliography From the web:

  • what heliograph mean
  • what does heliograph mean
  • what is heliography photography
  • what does heliograph mean in photography
  • heliograph definition
  • what is heliograph called
  • when was the heliograph made
  • what is holography technology
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