Word Direct Answers

heliograph

heliograph is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.An instrument for taking photographs of the sun.
  2. 2.An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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