Pachycephalosaurian Definition
păkĭ-sĕfə-lə-sôrē-ən
noun
Any of various herbivorous bipedal ornithischian dinosaurs of the group Pachycephalosauria of the Cretaceous Period, having a very thick skull and a beaked mouth.
American Heritage
Origin of Pachycephalosaurian
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From New Latin Pachycephalosauria group name from Pachycephalosaurus type genus pachycephalosaurus
From American Heritage Dictionary of the English Language, 5th Edition
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