( a. )
An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct.
( a. )
An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012