camera obscura(redirected from camera obscuras)
Also found in: Dictionary, Thesaurus.
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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
camera obscura[¦kam·rə əb′skyu̇r·ə]
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.