from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various medium-sized herbivorous dinosaurs of the genus Pachycephalosaurus of the late Cretaceous period of North America, having a beaked mouth, rows of bumps on the head, and a domed skull up to ten inches (25.4 cm) thick.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a group of herbivorous dinosaurs, of the genus Pachycephalosaurus from the late Cretaceous period
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found
New Latin Pachycephalosaurus, genus name : Greek pakhus, thick + Greek kephalē, head; see ghebh-el- in Indo-European roots + Greek sauros, lizard.(American Heritage® Dictionary of the English Language, Fourth Edition)