Camera Obscura :: Camera obscura () 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..

Camera Obscura :: Camera obscura () 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..

Obscurant :: Obscurant (n.) One who obscures; one who prevents enlightenment or hinders the progress of knowledge and wisdom.

Obscurantism :: Obscurantism (n.) The system or the principles of the obscurants.

Obscurantist :: Obscurantist (n.) Same as Obscurant.

Obscuration :: Obscuration (v. t.) The act or operation of obscuring; the state of being obscured; as, the obscuration of the moon in an eclipse..

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