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A small herbivorous ceratopsian dinosaur of the genus Protoceratops of the Cretaceous Period, characterized by a bony frill on the back of the skull and a beaked mouth.

[New Latin Prōtocerātōps, genus name : Greek prōto-, proto- + Greek keras, kerāt-, horn; see ker- in Indo-European roots + Greek ōps, eye, face; see okw- in Indo-European roots.]
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Noun1.protoceratops - small horned dinosaurprotoceratops - small horned dinosaur    
ceratopsian, horned dinosaur - any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
References in periodicals archive ?
In the case of the horned Protoceratops andrewsi, the museum says, it has been believed that "males could be distinguished from females by a broader frill and larger bump on the nose.
A 70 million year old nest was discovered containing 15 young Protoceratops andrewsi skeletons.
Washington, Nov 22 (ANI): A University of Rhode Island paleontologist has described a large nest of juvenile Protoceratops andrewsi dinosaurs - first of this genus ever found - from Mongolia.