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3 Noun 0 Verb 0 Adj. 0 Adv.
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ENconcave lensNoun
EN
A lens such that a parallel beam of light passing through it is caused to diverge or spread out
diverging lens
bn:00021519n Concept
EN
Light transparent structure which is thin in middle and thick in its edges
bn:07014963n Concept
bn:20212327n Concept

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