achromate

achromate (plural achromates)

1. Alternative form of achromat (“type of lens”)
   • 1967, Paul Bener, A New Spectrophotometer for Measuring Ultraviolet Sky Brightness and Direct Solar Radiation, page 14:

     Each achromate consists of a quartz and a fluorite lens mounted in a common frame.

2. Alternative form of achromat (“color-blind person”)
   • 2010, James Wynbrandt, Mark D. Ludman, The Encyclopedia of Genetic Disorders and Birth Defects, page 7:

     An achromate, as affected individuals are known, must rely on the rods, the photoreceptors responsible for vision at night and in low-light situations, for vision at all times.

   • 2016, Sylvain Seccia, Désiré:

     Funny you should mention colours... I'm an achromate from birth.