retinal

¹ American  

[ret-n-uhl] / ˈrɛt n əl /

adjective

1. of or relating to the retina of the eye.

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retinal ² American  

[ret-n-al, -awl] / ˈrɛt nˌæl, -ˌɔl /

Also retinene

noun

Biochemistry.

1. an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.

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Etymology

Origin of retinal¹

First recorded in 1830–40; retin(a) + -al ¹

Origin of retinal²

First recorded in 1940–45; retin(a) + -al ³

Example Sentences

She finally landed a steady job working at an ophthalmology practice as a technician and retinal photographer.

From MarketWatch

She finally landed a steady job working at an ophthalmology practice as a technician and retinal photographer.

From MarketWatch

"It was remarkable to find dividing cells at the edge of the worm's retina -- the same place where some groups of vertebrates maintain their retinal stem cells for life-long eye growth," Milivojev says.

From Science Daily

Biometrics uses physical characteristics, such as fingerprints, facial recognition software and retinal scans to verify an identity.

From Los Angeles Times

In a study published in Cell Stem Cell, scientists tested retinal pigment epithelial stem cells in a phase 1/2a clinical trial.

From Science Daily