13 letters · 16 points in Scrabble
noun large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America
originFrom translingual Tyrannosaurus, from Ancient Greek τύραννος (túrannos, “tyrant”) + σαῦρος (saûros, “lizard”).
Etymology from Wiktionary, CC BY-SA 3.0