noun. 1  a. Political division of an area into partially autonomous regions. 2  Loyalty to the interests of a particular region. 3  A feature, such as an expression, a pronunciation, or a custom, that is characteristic of a geographic area.  The use of regional characteristics, as of locale, custom, or speech, in literature or art.
The number of teeth dinosaurs had varied dramatically, depending on the type of dinosaur. Some dinosaurs, like Ornithomimus and Gallimimus, did not have teeth. On the other end of the spectrum, Tyrannosaurus rex had 50 to 60 solid cone-shaped teeth as big as bananas. Hadrosaurs, or duck-billed dinosaurs, had the most teeth: up to 960 cheek teeth! Dinosaur teeth were replaceable. If a dinosaur broke or lost a tooth, another grew in to take the place, behaving much like sharks teeth do today.
Four inch long sharp teeth were also used to tear apart the dead and dying victims that were unfortunate enough to have been hunted by Allosaurus. Fossils found in Utah, North America, suggest that Allosaurus may have lived and hunted in groups or packs. As a pack, Allosaurus would have had little difficulty hunting the largest dinosaurs of the time. One fossil of a large plant-eating Apatosaurus has what look like the teeth marks of Allosaurus scraped into it.