Sekirov Dictionary

heliograph

/ˈhiː.li.əˌɡɹæf/

noun 5
verb 4
forms 3

noun5

•
An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
- It was a lieutenant and a couple of privates of the 8th Hussars, with a stand like a theodolite, which the artilleryman told me was a heliograph. — 1895
A heliogram.
A device for photographing the sun.
An instrument for measuring the intensity of sunlight.
(no longer used) A photograph.

verb4

•
To send a message by heliograph.
- With damnatory dot and dash he heliographed his wife / Some interesting details of the General's private life. — 1919
To send a heliograph.
(figurative) To message or indicate as though by heliograph.
(old-fashioned) To photograph by sunlight.

forms

heliographed · heliographing · heliographs

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