from The Century Dictionary.

  • noun In a telescope or microscope, the lens which first receives the rays of light coming directly from the object, and collects them into a focus, where they form an image which is viewed through the eyepiece.

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

  • noun the lens or system of lenses in a telescope or microscope that is nearest the object being viewed


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    Sorry, no example sentences found.


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