camera obscura
Pronunciation: /ɒbsˈkjʊərə/
noun
- a darkened box with a convex lens or aperture for projecting the image of an external object on to a screen inside, a forerunner of the modern camera.
- 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.
Origin:
early 18th century: from Latin, 'dark chamber'