|a fool or simpleton; ninny.|
|a stew of meat, vegetables, potatoes, etc.|
|—n , pl -nas, -nae|
|the light-sensitive membrane forming the inner lining of the posterior wall of the eyeball, composed largely of a specialized terminal expansion of the optic nerve. Images focused here by the lens of the eye are transmitted to the brain as nerve impulses|
|[C14: from Medieval Latin, perhaps from Latin rēte net]|
retina ret·i·na (rět'n-ə)
n. pl. ret·i·nas or ret·i·nae (rět'n-ē')
The delicate multilayered light-sensitive membrane lining the inner posterior chamber of the eyeball containing the rods and cones and connected by the optic nerve to the brain.
|retina (rět'n-ə) Pronunciation Key
Plural retinas or retinae (rět'n-ē')
The light-sensitive membrane that lines the inside of the back of the eyeball and connects to the brain by the optic nerve. The retina of vertebrate animals contains rods and cones, specialized cells that absorb light.