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2017 Word of the Year

astigmatizer

[uh-stig-muh-tahy-zer] /əˈstɪg məˌtaɪ zər/
noun, Optics.
1.
a cylindrical lens used in a rangefinder to draw out the point image of a point source into a line.
Origin of astigmatizer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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