pach·y·ceph·a·lo·saur·i·an 
(păk′ĭ-sĕf′ə-lə-sôrē-ən)
(păk′ĭ-sĕf′ə-lə-sôrē-ən)n.
Any of various herbivorous bipedal ornithischian dinosaurs of the group Pachycephalosauria of the Cretaceous Period, having a very thick skull and a beaked mouth. Also called pachycephalosaur.
[From New Latin Pachycephalosauria, group name, from Pachycephalosaurus, type genus; see PACHYCEPHALOSAURUS.]
pach′y·ceph′a·lo·sauri·an adj.
- practice teacher
- practice teaching
- practicing
- practicum
- practise
- practitioner
- Prader-Willi syndrome
- praedial
- praemorse
- praemorse
- praemunire
- praenomen
- praenominal
- praetor
- praetorial
- praetorian
- Praetorian Guard
- praetorship
- pragmatic
- pragmatical
- pragmatically
- pragmatics
- pragmatic sanction
- pragmatism
- pragmatist