definition of the word heliography

by the Wiktionnary

Singular
heliography

Plural
uncountable

heliography (uncountable)

  1. The scientific study of the sun
  2. The art of making a heliograph
  3. The system of signalling by heliograph
Retrieved from "http://en.wiktionary.org/wiki/heliography"
Definition from Wiktionary
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