retinal rod
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Noun | 1. | retinal rod - a visual receptor cell that is sensitive to dim light retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve visual cell - one of the cells of the retina that is sensitive to light retinal purple, rhodopsin, visual purple - a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light |
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