Noun: visual purple 'vi-zhoo-ul 'pur-pul
- A red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
"visual purple plays a crucial role in night vision";
- rhodopsin, retinal purple
Derived forms: visual purples
Type of: photopigment
Part of: retinal rod, rod, rod cell
Encyclopedia: Visual purple