[ ˌsɛrə'tɒpsɪən , ˌkɛr- ]
■ noun Palaeontology a gregarious quadrupedal herbivorous dinosaur of a group including triceratops, with a bony frill protecting the neck.
Origin
early 20th cent.: from mod. L. Ceratopsia (plural, from Gk keras , kerat- 'horn' + ops 'face') + -an .