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A large pachycephalosaurian dinosaur of the genus Pachycephalosaurus, having a thick domed skull with bony knobs and a long tail. Also called pachycephalosaur.

[New Latin Pachycephalosaurus, genus name : Greek pakhus, thick + Greek kephalē, head; see ghebh-el- in Indo-European roots + Greek sauros, lizard.]


A medium-sized, plant-eating dinosaur of the late Cretaceous Period having a domed skull up to 10 inches (25.4 centimeters) thick.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pachycephalosaurus - bipedal herbivore having 10 inches of bone atop its headpachycephalosaurus - bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found
bone-headed dinosaur - bipedal herbivorous dinosaurs with bony crowns
References in periodicals archive ?
The list of dinosaurs in the movie include Ankylosaurus, Apatosaurus, Baryonyx, Dimorphodon, Edmontosaurus, Gallimimus, Metriacanthosaurus, Microceratus, Mosasaurus, Pachycephalosaurus, Parasaurolophus, Pteranodon, Stegosaurus, Suchomimus, Triceratops and Tyrannosaurus Rex.
The investigations reveal that "larger domed pachycephalosaurs such as Pachycephalosaurus may have been head-butting like Dall sheep or head-shoving like bison, while smaller, high-domed taxa such as Stegoceras may have been flank-butting like mountain goats," Peterson said.
I would like to have a pet Pachycephalosaurus in the backyard," says Bryan.
In 2009, with co-author Mark Goodwin, Horner suggested that the well-known dome-headed dinosaurs Dracorex and Sygimoloch were simply misidentified juveniles of the much larger Pachycephalosaurus.
Pachycephalosaurus wyomingensis had a large domed skull that some argue was used to butt heads in dominance displays.
The scientific name for the first, largest-skulled dinosaur is Pachycephalosaurus wyomingensis.
exhibit provides a brush-up on a bunch of them, including the perhaps less familiar parasaurolophus, dilophosaurus, compsognathus, pachycephalosaurus, rhamphorhynchus and deinonychus.