nounpl. retinas or retinae
Origin of retinaMedieval Latin probably ; from Classical Latin rete (gen. retis), net ; from Indo-European base an unverified form ere-, loose, separate from source Classical Greek erēmos, solitary, Lithuanian rẽtis, sieve and amp; (prob.) Classical Latin rarus, rare
nounpl. ret·i·nas or ret·i·nae
Origin of retinaMiddle English, from Medieval Latin rētina, from Latin rēte, net.
(plural retinas or retinae or retinæ)
From Medieval Latin retina, the diminutive form of Latin rete (“net”), probably from the Vulgar Latin phrase (tunica) *retina, literally "net-like tunic", used to describe the blood vessel system at the back of the eye. (Gerard of Cremona may have created this phrase as a translation for Arabic (tabaqa) sabakiva "net-like layer", which translates Ancient Greek ἀμφιβληστροειδής (amphiblēstroeidēs) (χιτών (khitōn))).