Meaning of lens

Definition of lens

genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
(metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen"
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina
electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons

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