achromat

[ ak-ruh-mat ]

noun

1. achromatic lens.

achromat

/ ˈækrəˌmæt /

noun

1. Also calledachromatic lens a lens designed to bring light of two chosen wavelengths to the same focal point, thus reducing chromatic aberration Compare apochromat
2. a person who has no colour vision at all and can distinguish only black, white, and grey. The condition is very rare

Word History and Origins

Origin of achromat¹

First recorded in 1905–10; by shortening