‖ [ LL. camera chamber + L. obscurus, obscura, dark. ] (Opt.) 1. An apparatus in which the images of external objects, formed by a convex lens or a concave mirror, are thrown on a paper or other white surface placed in the focus of the lens or mirror within a darkened chamber, or box, so that the outlines may be traced. [ 1913 Webster ]
2. (Photog.) An apparatus in which the image of an external object or objects is, by means of lenses, thrown upon a sensitized plate or surface placed at the back of an extensible darkened box or chamber variously modified; -- commonly called simply the camera. [ 1913 Webster ]
Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Camera obscura \Cam"e*ra ob*scu"ra\ [LL. camera chamber + L.
obscurus, obscura, dark.] (Opt.)
1. An apparatus in which the images of external objects,
formed by a convex lens or a concave mirror, are thrown on
a paper or other white surface placed in the focus of the
lens or mirror within a darkened chamber, or box, so that
the outlines may be traced.
[1913 Webster]
2. (Photog.) An apparatus in which the image of an external
object or objects is, by means of lenses, thrown upon a
sensitized plate or surface placed at the back of an
extensible darkened box or chamber variously modified; --
commonly called simply {the camera}.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
camera obscura
n 1: a darkened enclosure in which images of outside objects are
projected through a small aperture or lens onto a facing
surface
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