anastigmat

from WordNet (r) 3.0 (2006)

anastigmat
    n 1: compound lens or lens system designed to be free of
         astigmatism and able to form approximately point images

from The Collaborative International Dictionary of English v.0.48

anastigmat \anastigmat\ n.
   1. compound lens or lens system designed to be free of
      astigmatism and able to form approximately point images.
      [WordNet 1.5]

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