1. The plural of achromaticity; the quality or state of being achromatic (lacking color or hue; colorless).
Usage: technical; optics; plural form
2. In optics, the degree to which a lens or optical system is free from chromatic aberration (color distortion).
Usage: technical; optics; plural form

Examples

• The achromaticities of different optical materials vary depending on their refractive properties.
• Engineers tested the achromaticities of the lens designs to minimize color fringing.
• The microscope's objective lens was praised for its exceptional achromaticities across the visible spectrum.
• Comparing the achromaticities of various glass types helped the manufacturer select the best material.
• Modern camera systems rely on precise achromaticities to produce sharp, color-accurate images.