7 letters · 7 points in Scrabble
noun either of two yellow to red retinal pigments formed from rhodopsin by the action of light
adjective in or relating to the retina of the eye
originEtymology tree English retina Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English retinal From retina + -al (“of or pertaining to”).
Etymology from Wiktionary, CC BY-SA 3.0