プロトケラトプスプロトケラトプスMeanings1nounprotoceratopsA genus of herbivorous ceratopsian dinosaur from the Late Cretaceous period, known for its frill and beak.from Latinプロトケラトプスの化か石せきはモンゴルで多おおく発はっ見けんされている。Many Protoceratops fossils have been discovered in Mongolia.