- a piece of transparent substance, usually glass, having two opposite surfaces either both curved or one curved and one plane, used in an optical device in changing the convergence of light rays, as for magnification, or in correcting defects of vision.
- a combination of such pieces.
- some analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
- crystalline lens.
- a body of rock or ore that is thick in the middle and thinner toward the edges, similar in shape to a biconvex lens.
- to film (a motion picture).
- a piece of glass or other transparent material, used to converge or diverge transmitted light and form optical images
- a combination of such lenses for forming images or concentrating a beam of light
- a device that diverges or converges a beam of electromagnetic radiation, sound, or particles
- anatomy See crystalline lens
- an industrial town in N France, in the Pas de Calais department; badly damaged in both World Wars. Pop: 36 206 (1999)