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retina definition

reti·na (ret′'n ə)

noun pl. retinas -·nas or retinae -·nae′ (-ē′)

the innermost coat lining the interior of the eyeball, containing various layers of photoreceptive cells that are directly connected to the brain by means of the optic nerve

Etymology: ML, prob. < L rete (gen. retis), net < IE base *ere-, loose, separate > Gr erēmos, solitary, Lith rẽtis, sieve & (prob.) L rarus, rare

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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