7 letters · 14 points in Scrabble
noun the transparent membrane enveloping the vitreous humor of the eye and separating it from the retina
adjective resembling glass in transparency or translucency; -Sacheverell Sitwell
originFrom Ancient Greek ὑαλοειδής (hualoeidḗs), from ὕαλος (húalos, “glass”) + -ειδής (-eidḗs, “-id”).
Etymology from Wiktionary, CC BY-SA 3.0