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Oroheliograph
Oroheliograph Or`o*he"li*o*graph, n. [Gr. ? mountain + helio-
+ -graph.] (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.
Meaning of Oroheliograph from wikipedia
