| retin | the light-sensitive membrane covering the back wall of the eyeball |
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| retin | either of two yellow to red retinal pigments formed from Rhodopsin by the action of light |
| retin | in or relating to the retina of the eye |
| retin | visual receptor cell sensitive to color |
| retin | visual impairment resulting from the retina becoming separated from the choroid in the back of the eye |
| retin | a red photopigment in the retinal rods of vertebrates |
| retin | visual receptor cell sensitive to dim light |
| retin | either of two yellow to red retinal pigments formed from Rhodopsin by the action of light |
| retin | inflammation of the retina |
| retin | malignant ocular tumor of retinal cells |
| retin | an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene |
| retin | the group following and attending to some important person |