ceratopsian; horned dinosaur
Refers to any quadrupedal herbivorous dinosaur of the infraorder Ceratopsia, such as Triceratops.
Ceratopsians flourished in the Late Cretaceous.
Triceratops is a famous type of ceratopsian.
Compound of 角 (つの, 'horn') and 竜 (りゅう, 'dragon' or 'dinosaur'), literally 'horned dragon'. The reading つのりゅう is a straightforward combination of the kun'yomi of 角 and the on'yomi of 竜.