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cam·er·a ob·scu·ra

/ˌkam(ə)rə əbˈskyo͝orə/

noun
- 1. a darkened box with a convex lens or aperture for projecting the image of an external object onto a screen inside. It is important historically in the development of photography.
- ▪ a small round building with a rotating angled mirror at the apex of the roof, projecting an image of the landscape on to a horizontal surface inside.
Word Origin early 18th century: from Latin, ‘dark chamber’.
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More definitions, origin and scrabble points

Camera obscura
Optical device that projects an image of its surroundings on a screen
A camera obscura (pl. camerae obscurae or camera obscuras; from 'dark chamber') is a darkened room with a small hole or lens at one side through which an image is projected onto a wall or table opposite the hole. The image (or the principle of its projection) of lensless camera obscuras is also referred to as "pinhole image". Camera obscura can also refer to analogous constructions such as a box o... Wikipedia
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