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camera obscura

   Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson 0.02 sec.
camera obscura
a darkened chamber or small building in which images of outside objects are projected onto a flat surface by a convex lens in an aperture

camera obscura [¦kam·rə əb′skyu̇r·ə]
(optics)
A primitive camera in which the real image of an object can be observed or traced on the wall of the enclosure opposite the aperture, rather than being recorded photographically.


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His mind seemed to turn, on the instant, into a vast camera obscura, and he saw arrayed around his consciousness endless pictures from his life, of stoke-holes and forecastles, camps and beaches, jails and boozing-kens, fever-hospitals and slum streets, wherein the thread of association was the fashion in which he had been addressed in those various situations.
 
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