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Lens 1Definition: A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure.
lens 2Definition: a transparent optical device used to converge or diverge transmitted light and to form images lens 3Definition: electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons lens 4Definition: biconvex transparent body situated behind the iris in the eye; it focuses light waves on the retina lens 5Definition: (metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen" Lens 6Definition: genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
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