Definition of retina noun from the Oxford Advanced American Dictionary

retina

noun
/ˈrɛtnə/
 
plural retinasorretinae
/ˈrɛtni/
 
 
a layer of tissue at the back of the eye that is sensitive to light and sends signals to the brain about what is seen retinal
/ˈrɛtnəl/
 
[usually before noun], adjective
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