(transitive) To deprive of colour; to make achromatic. / (transitive) To remove chromatic aberration from an optical system

The state or quality of being achromatic; achromaticity. / The state of being free of colors, not emitting or separating into colors. / Achromatopia.

(optics) Free from color; transmitting light without color-related distortion. / Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.

(optics) A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other.

plural of achromatic lens