|1.||a piece of glass or other transparent material, used to converge or diverge transmitted light and form optical images|
|2.||Also called: compound lens a combination of such lenses for forming images or concentrating a beam of light|
|3.||See electron lens a device that diverges or converges a beam of electromagnetic radiation, sound, or particles|
|4.||anatomy See crystalline lens|
|[C17: from Latin lēns lentil, referring to the similarity of a lens to the shape of a lentil]|
n. pl. lens·es
A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of which light rays are refracted so that they converge or diverge to form an image.
A transparent, biconvex body of the eye between the iris and the vitreous humor that focuses light rays entering through the pupil to form an image on the retina.
|lens (lěnz) Pronunciation Key
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industrial town, Pas-de-Calais departement, Nord-Pas-de-Calais region, northern France, southwest of Lille. It was the chief urban centre of the Pas-de-Calais coal basin. Since the demise of coal mining in the 1980s, a wide range of new industries and services has been developed in Lens. These include companies manufacturing wires and cables, paper, metals, glass, frozen foods, and chemicals, as well as firms specializing in packaging and transport. Lens is also a commercial and administrative centre, and it is the site of a branch of the University of Artois. The town, which was completely destroyed in World War I, was damaged again in World War II. Pop. (1999) town, 36,206; (2004 est.) 35,200
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