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1. Oxford Dictionary

   protoceratops

   • IPA[ˌprəʊtə(ʊ)ˈsɛrətɒps]

   英式

   • n.
     a small quadrupedal dinosaur of the late Cretaceous period, having a bony frill above the neck and probably ancestral to triceratops.

   • noun: protoceratops, plural noun: protoceratopses