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Paleolithic :: Paleolithic (a.) Of or pertaining to an era marked by early stone implements. The Paleolithic era (as proposed by Lubbock) includes the earlier half of the Stone Age; the remains belonging to it are for the most part of extinct animals, with relics of human beings..

Microlestes :: Microlestes (n.) An extinct genus of small Triassic mammals, the oldest yet found in European strata..

Extinct :: Extinct (v. t.) To cause to be extinct.

Toxodon :: Toxodon (n.) A gigantic extinct herbivorous mammal from South America, having teeth bent like a bow. It is the type of the order Toxodonta..

Orthoceras :: Orthoceras (n.) An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa..

Pentamerus :: Pentamerus (n.) A genus of extinct Paleozoic brachiopods, often very abundant in the Upper Silurian..

Dinosauria :: Dinosauria (n. pl.) An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large bird tracks, so-called, of mesozoic sandstones; others were five-toed and quadrupedal. See Illust. of Compsognathus, also Illustration of Dinosaur in Appendix..

Staging :: Staghound (n.) A large and powerful hound formerly used in hunting the stag, the wolf, and other large animals. The breed is nearly extinct..

Pliosaurus :: Pliosaurus (n.) An extinct genus of marine reptiles allied to Plesiosaurus, but having a much shorter neck..

Aurochs :: Aurochs (n.) The European bison (Bison bonasus, / Europaeus), once widely distributed, but now nearly extinct, except where protected in the Lithuanian forests, and perhaps in the Caucasus. It is distinct from the Urus of Caesar, with which it has often been confused..

Tillodontia :: Tillodontia (n. pl.) An extinct group of Mammalia found fossil in the Eocene formation. The species are related to the carnivores, ungulates, and rodents. Called also Tillodonta..

Fine :: Fine (n.) End; conclusion; termination; extinction.

Pterosauria :: Pterosauria (n. pl.) An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria..

Zeuglodon :: Zeuglodon (n.) A genus of extinct Eocene whales, remains of which have been found in the Gulf States. The species had very long and slender bodies and broad serrated teeth. See Phocodontia..

Inextinct :: Inextinct (a.) Not quenched; not extinct.

Stegosauria :: Stegocephala (n. pl.) An extinct order of amphibians found fossil in the Mesozoic rocks; called also Stegocephali, and Labyrinthodonta..

Plesiosauria :: Plesiosauria (n. pl.) An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia..

Extinct :: Extinct (a.) Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law..

Hybodus :: Hybodus (n.) An extinct genus of sharks having conical, compressed teeth..

Ichthyosauria :: Ichthyosauria (n. pl.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period..

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