Marginocephalian Definition
märjə-nō-sə-fălē-ən
noun
Any of various herbivorous ornithiscian dinosaurs of the group Marginocephalia of the Cretaceous Period, characterized by a bony shelf or frill at the back of the skull and including the ceratopsians and the pachycephalosaurians.
American Heritage
Synonyms:
- suborder Marginocephalia
- Marginocephalia
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