# photopigment

> English word · Noun

## Definitions
1. Any pigment that is unstable in the presence of light; used especially of the chromophore pigments in the rod cells and cone cells of the eye

## Etymology
From photo- + pigment.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/photopigment