Definition: Any of three visual pigments, composed of 11-cis-retinal bound to an opsin, found in the cones of the retina.
Synonym(s): visual violet
[G. ion, violet, + ops, eye, + -in]
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.