What does ceratopsian mean?
A ceratopsian is any member of Ceratopsia, an infraorder of plant-eating, beaked dinosaurs that flourished during the Late Cretaceous period, roughly 100 to 66 million years ago. These animals are best known for their striking skull ornamentation: a bony frill extending from the back of the head and, in many species, one or more horns on the snout or brow. The group ranges from small, largely hornless early forms discovered in Asia to giants such as Triceratops among the later North American ceratopsids. The word derives from Greek roots meaning "horned face," and it is used mainly in paleontological literature, natural history museums, and popular science writing. Because ceratopsians were among the last and most successful groups of non-avian dinosaurs before the end-Cretaceous extinction, the term frequently appears in discussions of dinosaur diversity and evolution.
nounA ceratopsian is any of a group of herbivorous, beaked dinosaurs of the Late Cretaceous period, characterized by a bony frill at the back of the skull and, in many species, horns on the face; the group includes Triceratops.
- Any herbivorous, typically horned and frilled dinosaur of the Late Cretaceous infraorder Ceratopsia, including Triceratops and its relatives.
"The museum's newest exhibit features a remarkably complete ceratopsian skeleton unearthed in Montana."
"Paleontologists identified the fossil as an early ceratopsian based on the distinctive rostral bone at the tip of its beak."
"Unlike most ceratopsians, this small Asian species lacked both horns and a prominent frill."
Regular plural formed by adding -s; used when referring to multiple individuals or members of the group.
"Herds of ceratopsians once grazed across the floodplains of western North America."
Every Triceratops you've ever admired is a ceratopsian — but so were its small, hornless ancestors that looked more like oversized parrot-beaked lizards than the famous three-horned icon.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ceratopsian
The term "ceratopsian" comes from Ceratopsia, the scientific name coined for the group in the late 19th century, built from the Greek elements keras (genitive kerasos, "horn") and ops ("face"), thus "horn-faced." The same Greek root keras underlies English words such as keratin and appears in the name Triceratops, meaning "three-horned face." The suffix -ian was added to form a general noun for a member of the group.
Related word forms
How ceratopsian is actually used
"Ceratopsian" is a technical term used chiefly in paleontology, museum contexts, and science writing; in everyday conversation speakers are more likely to name a specific dinosaur such as Triceratops. It functions almost exclusively as a noun referring to the animal or the group, though it can occasionally modify another noun (as in "ceratopsian frill").
Easily confused with ceratopsian
A ceratopsid is a member of the family Ceratopsidae, a narrower subgroup of the broader infraorder Ceratopsia to which all ceratopsians belong.