monochromatic aberration

mon·o·chro·mat·ic ab·er·ra·tion

a defect in an optic image arising because of the nature of lenses; the main types are spheric, coma, curvature, and distortion aberration, and astigmatism of oblique pencils.

mon·o·chro·mat·ic ab·er·ra·tion

(mon'ō-krō-mat'ik ab-ĕr-ā'shŭn)
A defect in an optic image arising because of the nature of lenses; the main types are spheric, coma, curvature, and distortion aberration, and astigmatism of oblique pencils.