Definition of retinal
(Entry 1 of 2)
: of, relating to, involving, or being a retina
retinal
nounDefinition of retinal (Entry 2 of 2)
: 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
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Merriam-Webster unabridged
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Time Traveler for retinal
The first known use of retinal was in 1798
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