HADROSAURUSES Antonyms

• late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus

• having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• extinct flying reptile

• herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon

• huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill

• large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America

• small active carnivore that probably fed on protoceratops; possibly related more closely to birds than to other dinosaurs