7 letters · 13 points in Scrabble
noun a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions
adjective resembling glass in transparency or translucency; -Sacheverell Sitwell
originFrom Latin hyalinus, from Koine Greek ὑάλινος (huálinos), from ὕαλος (húalos, “glass”).
Etymology from Wiktionary, CC BY-SA 3.0