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retina Line breaks: ret¦ina
Pronunciation: /ˈrɛtɪnə/

Definition of retina in English:

noun (plural retinas or retinae ˈrɛtɪniː)

A layer at the back of the eyeball that contains cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
Example sentences
  • And for vision it is also necessary that there should be visual purple behind the retina and an opaque cornea and iris.
  • As with similar work in the United States, the prosthetic retina works by passing artificially stimulating the optic nerve, in line with signals from a tiny digital camera mounted on a pair of glasses.
  • The chip captures light that enters the eye, and generates an electrical signal that is transmitted to the overlaying neural cells of the retina.


Late Middle English: from medieval Latin, from Latin rete 'net'.

Definition of retina in:
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