pach·y·ceph·a·lo·saur (p k  -s f  -l-sôr)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. [New Latin Pachycephalosaurus, genus name : Greek pakhus, thick + Greek kephal  , head; see ghebh-el- in Indo-European roots + Greek sauros, lizard.] |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  pachycephalosaur - bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever foundbone-headed dinosaur - bipedal herbivorous dinosaurs with bony crowns |
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