heliograph
heliograph · heliographs
An apparatus for signalling by means of a moveable mirror which reflects flashes of…An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
US/ˈhiː.li.əˌɡɹæf/
Meaning
5 sensesAn apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
A heliogram.
An instrument for measuring the intensity of sunlight.
A device for photographing the sun.
(obsolete)A photograph.
More definitions
- an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
Origin
From helio- + -graph.From helio- + -graph.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: heliographs| Singular | heliograph |
|---|---|
| Plural | heliographs |
regular