achromat

American

[ak-ruh-mat] / ˈæk rəˌmæt /

noun

achromatic lens.

achromat British

/ ˈækrəˌmæt /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of achromat

First recorded in 1905–10; by shortening

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023