retinal
adjective(ret-i-nal)
of, relating to, involving, or being a retina
retinal
noun(ret-i-nal)
a yellowish to orange aldehyde C20H28O derived from vitamin A that in combination with proteins forms the visual pigments of the retinal rods and cones
retinal
noun(ret-i-nal)
a condition in which the retina of the eye is no longer connected to the eye as it should be