plesiosaur Definition

plesiosaurus, necked, ichthyosaur, mosasaur, theropod, dinosaur, pterosaur, hadrosaur, apatosaurus, diplodocus, tyrannosaur, allosaurus, iguanodon, archosaur, trilobite, brachiosaurus, tyrannosaurus rex, crocodilian, triceratops, baleen whale, genus australopithecus, woolly mammoth, sea scorpion, australopithecine, archaeopteryx, tyrannosaurus, prehistoric, ornithopod, dimetrodon, cenozoic era, permian period, sauropod dinosaur, coprolite, horned dinosaur, psittacosaurus, columbian mammoth, sauropods, archeopteryx, fossils, crinoids, ammonites, ankylosaur, edmontosaurus, toothed whale, smilodon, robustus, theropod dinosaur, coprolites, woolly rhinoceros, conodonts, camarasaurus, australopithecus africanus, peccary, mammal, mammuthus, protoceratops, stegodon, beaked whale, palaeontology, nothosaur, mastodon, architeuthis, utahraptor, australopithecus afarensis, ostracods, compsognathus, coelophysis, monotremes, isopod, stegosaur, duckbilled, erectus, brachiopods, bony fish, devonian period, eoraptor, hominid, flatfishes, bryozoans, homo heidelbergensis, anthropoids, coelacanth, tusk, megafauna, australopithecus, oarfish, pallasite, paranthropus, arapaima, concretions, paleobiology, spiny anteater, ceratosaur, aurochs, palaeontologist, stromatolite, mammoths, tetrapods, homo habilis, ocean sunfish,