(Greek: the color rose [red]; roselike, rose-colored)
An evergreen shrub of the heath family that is native to southern Asia but is widely grown in temperate regions for its cluster of brightly colored flowers. Via Latin, "oleander", from Greek, rhodon, "rose" plus dendron, "tree".
A bright-red photosensitive pigment found in the rod-shaped cells of the retina of certain fish and most higher vertebrates.
It is broken down by the action of dim light into retinal (layer of neurons, or nerve cells, that line the back of the eye) and opsin (several compounds that form the protein component of the light-sensitive retina pigment).
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