Definition of ceratopsian
: any of a suborder (Ceratopsia) of ornithischian dinosaurs of the Late Cretaceous having horns, a sharp horny beak, and a bony frill projecting backward from the skull
Recent Examples of ceratopsian from the Web
The findings are the latest in a long-running controversy over why ceratopsians—the dinosaur group containing Triceratops—lugged around massive, bony frills on their heads.
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Britannica.com: Encyclopedia article about ceratopsian
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