heliography

he·li·o·graph  (hl--grf)

n.

1. A device for transmitting messages by reflecting sunlight.

2. A device for photographing the sun.

v. he·li·o·graphed, he·li·o·graph·ing, he·li·o·graphs

v.tr.

To send (a message) by heliograph.

v.intr.

To send a heliograph.

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heli·ogra·pher (-gr-fr) n.

heli·o·graphic adj.

heli·ogra·phy (-gr-f) n.

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heliography

1. the measurement of the duration and intensity of sunlight.
2. the system or process of signaling by reflecting the sun’s rays in a mirror.
3. an early photographic process involving coated metal plates exposed to sunlight. — heliographer, n. — heliographic, heliographical, adj.

See also: Sun