IPA: //ˈeɪkrəˌmæt//
KK: /ˈeɪkrəˌmæt/
A type of lens that reduces or eliminates color distortion, allowing for clearer images without the interference of colors.
The photographer used an achromat to reduce color distortion in his images.
Achromat is formed from "a-" (meaning without) and "chroma" (from Greek "chroma", meaning color). The word describes something that is without color or colorless.
Think of 'a-' meaning without and 'chroma' meaning color — this helps you remember that an achromat is something that lacks color.