astigmatizer

[ uh-stig-muh-tahy-zer ]
/ əˈstɪg məˌtaɪ zər /

noun Optics.

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 Unabridged Dictionary, © Random House, Inc. 2019