9 letters · 11 points in Scrabble
noun an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb
originFrom ptero- + -saur, literally “wing lizard”, from Ancient Greek πτερόν (pterón, “feather, wing”) and σαῦρος (saûros, “lizard, reptile”).
Etymology from Wiktionary, CC BY-SA 3.0