WordReference Random House Unabridged Dictionary of American English © 2026
cer•a•top•si•an
(ser′ə top′sē ən),USA pronunciation n.
- Paleontologyany of several four-footed, herbivorous dinosaurs of the suborder Ceratopsia, of the late Cretaceous Period, having an enlarged skull with a beak, a large perforated frill at the back, and, in some species, one or three horns. Also called horned dinosaur.
- Neo-Latin Ceratopsi(a) (see cerat-, -opsis, -ia) + -an
'ceratopsian' also found in these entries (note: many are not synonyms or translations):