1. Any member of the order of herbivorous bipedal dinosaurs characterized by bird-like characteristics in the skeleton, sophisticated teeth structures and bills, and crests used for communication and/or attracting mates.
1. A member of the Ceratopsidae species group of quadrupedal dinosaurs, mainly found in Western North America, characterized as quadrupedal herbivores with beaks, rows of sheering teeth, and elaborate horns and/or frills.The horns were likely used for self-defense and/or attractive mates.
1. Any member of the suborder of quadrupedal dinosaurs called Ankylosauria, characterized by small heads, short powerful limbs, bulky bodies with armor-like plating, and protective horns/spines along their body.
1. Any member of the suborder Theropoda, comprising carnivorous dinosaurs that had short forelimbs and walked or ran on their hind legs. Their name, fittingly, means "bird-footed" and this group of dinosaurs are most likely the ancestors to all modern birds.