Dictionary

1retinal

adjective ret·i·nal \ˈre-tə-nəl, ˈret-nəl\

Definition of RETINAL

:  of, relating to, involving, or being a retina

First Known Use of RETINAL

1838

2retinal

noun ret·i·nal \ˈre-tə-ˌnal, -ˌnl\

Definition of RETINAL

:  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

Origin of RETINAL

retin- + 3-al
First Known Use: 1944

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