from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun optics A lens having at least one convex surface, such that light passing through it may be brought to a focus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun lens such that a beam of light passing through it is brought to a point or focus


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    Sorry, no example sentences found.


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