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.
Spinosaurus (spined lizard) was a theropod dinosaur that existed in what is now North Africa during the Cretaceous Period. Spinosaurus is the largest of all known carnivorous dinosaurs, even larger than Tyrannosaurus rex, Carcharodontosaurus, and Giganotosaurus. Estimates published in 2014, and based on more complete specimens, found that Spinosaurus could reach lengths greater than 15 m (49.2 ft).