rhodopsin Meaning, Definition & Usage

  1. noun a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
    visual purple; retinal purple.

WordNet

Rho*dop"sin noun
Etymology
Gr. "ro`don rose + "w`ps eye.
Definitions
  1. (Physiol.) The visual purple. See under Visual.

Webster 1913