n., pl., ret·i·nas, or ret·i·nae (rĕt'n-ē').
A delicate, multilayered, light-sensitive membrane lining the inner eyeball and connected by the optic nerve to the brain.
[Middle English, from Medieval Latin rētina, from Latin rēte, net.]
retinal ret'i·nal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
