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  • Dinosaur - Wikipedia
    Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria They first appeared during the Triassic period , between 243 and 233 23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research
  • Dinosaur | Definition, Types, History, Names, Facts | Britannica
    dinosaur, (clade Dinosauria), the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly 180 million years
  • What Makes a Dinosaur a Dinosaur - U. S. National Park Service
    A more handy general definition would go something like this: Dinosaurs are extinct animals with upright limbs that lived on land during the Mesozoic Era (252 to 66 million years ago) This would basically capture how paleontologists long thought about dinosaurs
  • Dinosaur Facts - American Museum of Natural History
    Discover why the Tyrannosaurus had sharp teeth, where the name “dinosaur” comes from, and more! Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years In 1842, the English naturalist Sir Richard Owen coined the term Dinosauria, derived from the Greek deinos, meaning “fearfully great,” and sauros, meaning “lizard ”
  • Dinosauria: How the ‘terrible lizards’ got their name
    You’ll often find ‘Dinosauria’, which is rooted in Greek, quoted as meaning ‘terrible lizard’ But in coining the term in his report, Owen refers to dinosaurs instead as ‘fearfully great’, acknowledging their large size – significantly surpassing that of any living reptile
  • The Dinosauria - University of California Museum of Paleontology
    The Dinosauria Dinosaurs, one of the most successful groups of animals (in terms of longevity) that have ever lived, evolved into many diverse sizes and shapes, with many equally diverse modes of living
  • DINOSAURIA Definition Meaning - Merriam-Webster
    : a group of extinct archosaurian reptiles widely distributed from the Triassic to the Cretaceous that had hind limbs extending directly beneath the body and comprised of chiefly terrestrial, bipedal or quadrupedal ornithischians (such as ankylosaurs and stegosaurs) and saurischians (such as sauropods and theropods) which included the ancestor o
  • Dinosaur World::Dinosauria
    Dinosaurs are animals that dominated the terrestrial ecosystem for over 100 million years Non-avian dinosaurs became extinct at the end of the Cretaceous period, 65 million years ago
  • Dinosauria | EBSCO Research Starters
    The term "Dinosauria," meaning "terrifying lizard," was first coined in 1842 and encompasses all nonavian dinosaurs, archaic avians, and modern-day birds, indicating their evolutionary connection to contemporary avian species
  • Dinosaur - Evolution, Classification, Extinction | Britannica
    Dinosauria was the first and included the iguanodonts, the large carnivores (or megalosaurids), and the armoured forms (including Scelidosaurus) Compsognatha was the second order, named for the very small birdlike carnivore Compsognathus





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