aplanatism
Also found in: Medical.
aplanatism
(əˈplænəˌtɪzəm)n
the state of being free from spherical aberration
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014