ALL meanings of apochromatic
ap·o·chro·mat·ic
A a - adjective apochromatic (of a lens) almost free from spherical and chromatic aberration 3
- adjective apochromatic corrected to prevent distortion of the image and the occurrence of refracted colors along its edges 3
- noun apochromatic (optics) Corrected for both chromatic aberration and spherical aberration. 1
- adjective apochromatic corrected for spherical aberration at two wavelengths or colors and for chromatic aberration at three wavelengths. 1