1) Photopigment 
(from the article `visual pigment`) ...in brighter light than scotopsins and occur in the vertebrate cone cells; they differ from the scotopsins only in the characteristics of the opsin ...
A visual pigment, composed of 11-cis-retinal bound to an opsin, found in the cones of the retina. ... Synonym: visual violet. ... Origin: G. Ion, violet, + ops, eye, + -in ... (05 Mar 2000) ... 
Type: Term Pronunciation: ī′ō-dop′sin Definitions: 1. Any of three visual pigments, composed of 11-cis-retinal bound to an opsin, found in the cones of the retina. Synonyms: visual violet
[n] - a violet photopigment in the retinal cones of the eyes of most vertebrates
a photosensitive violet pigment that occurs in the cones of the retina and is transformed by light into retinal and an opsin protein. Cf. rhodopsin.