anastigmatic

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an·as·tig·mat·ic

 (ăn-ăs′tĭg-măt′ĭk)
adj.
Free from astigmatism. Used of a compound lens in which the separate components compensate for the astigmatic effects of each lens.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

anastigmatic

(ˌænəstɪɡˈmætɪk)
adj
(General Physics) (of a lens or optical device) not astigmatic. Also: stigmatic
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

an•as•tig•mat•ic

(ˌæn ə stɪgˈmæt ɪk, æˌnæs tɪg-)

adj.
(of a lens) not having astigmatism; forming point images of a point object located off the axis of the lens; stigmatic.
[1885–90]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.anastigmatic - pertaining to a lens or lens system free of astigmatism (able to form point images)anastigmatic - pertaining to a lens or lens system free of astigmatism (able to form point images)
2.anastigmatic - not astigmaticanastigmatic - not astigmatic      
astigmatic - of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images
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