long-wavelength pigment

the photopigment, present in one of the three populations of retinal cones, that has maximum sensitivity to a light wavelength of 558 nm. The absence of the gene for the long-wavelength pigment causes protanopia (red color blindness). See also medium-wavelength pigment; short-wavelength pigment.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

December 18th 2024

quazepam

quazepam

n. a benzodiazepine used as a hypnotic agent. It is of medium potency and is highly lipid soluble, enabling rapid penetration of the blood–brain barrier and resulting in rapid onset of effects. Because its metabolic products are eliminated slowly, quazepam may accumulate in the body, leading to unwanted daytime sedation. U.S. trade name: Doral.