The Collaborative International Dictionary of English v.0.48:
Ceratopsia \Ceratopsia\ n. a suborder of extinct animals including triceratops. Syn: suborder Ceratopsia. [WordNet 1.5]WordNet (r) 3.0 (2006):
Ceratopsia n 1: horned dinosaurs [syn: Ceratopsia, suborder Ceratopsia]