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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Or·o·he·li·o·graph n.  Photog. A camera for obtaining a circular panoramic view of the horizon.  The photographic plate is placed horizontally with a vertical lens above.  A mirror of peculiar shape reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.
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