retinal

¹

[ ret-n-uhl ]

adjective

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

retinal

²

[ ret-n-al, -awl ]

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.

Word History and Origins

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

"Shaken baby syndrome" - now called abusive head trauma - is usually diagnosed after finding evidence of retinal haemorrhage, brain swelling and bleeding in the brain.

From BBC

These included a fractured skull with associated bleeding to the brain and retinal bleeding; 27 rib fractures; fractures to both thigh bones; fractures to both shin bones; fractured wrist and a lacerated liver.

From BBC

He said the 13-week-old had suffered multiple serious injuries including abusive head trauma, retinal haemorrhage, extensive face and neck bruising and a fracture of the tibia.

From BBC

The reason for my Picasso of a face is because of a retinal disease I snag after my mother goes into labor three months early.

From Los Angeles Times

Kenichi Toma, PhD, labeled the retinal neurons closest to the blood vessels with a protein that glows green under ultraviolet light so he could observe the lattice as it was forming.

From Science Daily