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.
The dinosaur's bite could exert up to 12, 814 pounds-force (57,000 Newtons) , which is roughly equivalent to the force of a medium-size elephant sitting down. T. rex had a mouth full of serrated teeth; the largest tooth of any carnivorous dinosaur ever found was 12 inches (30 centimeters) long. But not all of the dinosaur's teeth served the same function, according to a 2012 study in the Canadian Journal of Earth Sciences.