he·li·o·graph (h  l- -gr f )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. he li·ogra·pher (- gr-fr) n.he li·o·graphic adj.he li·ogra·phy (-gr-f) n. |
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: Sun2. 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.
heliography - Using a mirror to send a signal.
See also related terms for mirror.
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