What does "heliograph" mean?
Heliograph: An instrument for taking photographs of the sun.
Additional senses
- 2.An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00