Science Dictionary
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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