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anastigmatic

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Anastigmatic
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an⋅as⋅tig⋅mat⋅ic

  [an-uh-stig-mat-ik, a-nas-tig-]
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–adjective Optics.
(of a lens) not having astigmatism; forming point images of a point object located off the axis of the lens; stigmatic.
Origin:
1885–90; an- 1 + astigmatic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Anastigmatic
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an·as·tig·mat·ic   (ān-ās'tĭg-māt'ĭk)   
adj.  Free from astigmatism. Used of a compound lens in which the separate components compensate for the astigmatic effects of each lens.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: an·astig·mat·ic
Pronunciation: "an-&-(")stig-'mat-ik, "an-"as-tig-
Function: adjective
: not astigmatic —usedespecially of lenses that are able to form approximately point images of object points
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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