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Pliohippus :: Pliohippus (n.) An extinct genus of horses from the Pliocene deposits. Each foot had a single toe (or hoof), as in the common horse..

Coryphodon :: Coryphodon (n.) A genus of extinct mammals from the eocene tertiary of Europe and America. Its species varied in size between the tapir and rhinoceros, and were allied to those animals, but had short, plantigrade, five-toed feet, like the elephant..

Belemnite :: Belemnite (n.) A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell of a cephalopod related to the sepia, and belonging to an extinct family. The belemnites are found in rocks of the Jurassic and Cretaceous ages..

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..

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

Absumption :: Absumption (n.) Act of wasting away; a consuming; extinction.

Escheat :: Escheat (n.) The falling back or reversion of lands, by some casualty or accident, to the lord of the fee, in consequence of the extinction of the blood of the tenant, which may happen by his dying without heirs, and formerly might happen by corruption of blood, that is, by reason of a felony or attainder..

Extinguishment :: Extinguishment (n.) The act of extinguishing, putting out, or quenching, or the state of being extinguished; extinction; suppression; destruction; nullification; as, the extinguishment of fire or flame, of discord, enmity, or jealousy, or of love or affection..

Die :: Die (v. i.) To perish in any manner; to cease; to become lost or extinct; to be extinguished.

Goniatite :: Goniatite (n.) One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic..

Paleechinoidea :: Paleechinoidea (n. pl.) An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also Palaeechini.

Fossil :: Fossil (n.) The remains of an animal or plant found in stratified rocks. Most fossils belong to extinct species, but many of the later ones belong to species still living..

Plesiosaurus :: Plesiosaurus (n.) A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age..

Modocs :: Modocs (n. pl.) A tribe of warlike Indians formerly inhabiting Northern California. They are nearly extinct.

Spiritoso :: Spiritless (a.) Having no breath; extinct; dead.

Notornis :: Notornis (n.) A genus of birds allied to the gallinules, but having rudimentary wings and incapable of flight. Notornis Mantelli was first known as a fossil bird of New Zealand, but subsequently a few individuals were found living on the southern island. It is supposed to be now nearly or quite extinct..

Paleozooogy :: Paleozooogy (n.) The science of extinct animals, a branch of paleontology..

Labyrinthodonta :: Labyrinthodonta (n. pl.) An extinct order of Amphibia, including the typical genus Labyrinthodon, and many other allied forms, from the Carboniferous, Permian, and Triassic formations. By recent writers they are divided into two or more orders. See Stegocephala..

Cheirotherium :: Cheirotherium (n.) A genus of extinct animals, so named from fossil footprints rudely resembling impressions of the human hand, and believed to have been made by labyrinthodont reptiles. See Illustration in Appendix..

Theriodontia :: Theriodontia (n. pl.) An extinct order of reptiles found in the Permian and Triassic formations in South Africa. In some respects they resembled carnivorous mammals. Called also Theromorpha.

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