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Brontozoum :: Brontozoum (n.) An extinct animal of large size, known from its three-toed footprints in Mesozoic sandstone..

Mesohippus :: Mesohippus (n.) An extinct mammal of the Horse family, but not larger than a sheep, and having three toes on each foot..

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..

Oreodon :: Oreodon (n.) A genus of extinct herbivorous mammals, abundant in the Tertiary formation of the Rocky Mountains. It is more or less related to the camel, hog, and deer..

Epiornis :: Epiornis (n.) One of the gigantic ostrichlike birds of the genus Aepiornis, only recently extinct. Its remains have been found in Madagascar..

Megatherium :: Megatherium (n.) An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths. Its remains are found in South America..

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

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

Extinguishment :: Extinguishment (n.) The annihilation or extinction of a right or obligation.

Mylodon :: Mylodon (n.) An extinct genus of large slothlike American edentates, allied to Megatherium..

Toothbill :: Toothbill (n.) A peculiar fruit-eating ground pigeon (Didunculus strigiostris) native of the Samoan Islands, and noted for its resemblance, in several characteristics, to the extinct dodo. Its beak is stout and strongly hooked, and the mandible has two or three strong teeth toward the end. Its color is chocolate red. Called also toothbilled pigeon, and manu-mea..

Garrote :: Garrote (n.) A Spanish mode of execution by strangulation, with an iron collar affixed to a post and tightened by a screw until life become extinct; also, the instrument by means of which the punishment is inflicted..

Atrypa :: Atrypa (n.) A extinct genus of Branchiopoda, very common in Silurian limestones..

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..

Sea Saurian :: Sea saurian (n.) Any marine saurian; esp. (Paleon.) the large extinct species of Mosasaurus, Icthyosaurus, Plesiosaurus, and related genera..

Productus :: Productus (n.) An extinct genus of brachiopods, very characteristic of the Carboniferous rocks..

Zoology :: Zoology (n.) That part of biology which relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct..

Odontotormae :: Odontotormae (n.pl.) An order of extinct toothed birds having the teeth in sockets, as in the genus Ichthyornis. See Ichthyornis..

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..

Decay :: Decay (n.) Gradual failure of health, strength, soundness, prosperity, or of any species of excellence or perfection; tendency toward dissolution or extinction; corruption; rottenness; decline; deterioration; as, the decay of the body; the decay of virtue; the decay of the Roman empire; a castle in decay..

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