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lens

lens

 
 
pronunciation:
lenz
part of speech: noun
inflections: lenses
definition 1: a piece of molded or ground transparent material such as glass, whose surfaces are curved so as to cause the divergence or convergence of light rays passing through it.
similar words:
eye
definition 2: a complex of such pieces, as in a camera or telescope.
 
similar words:
eye
definition 3: a part of the eye that focuses light rays to form an image on the retina.