Dinothérium (Gr., 'terrible beast'), a remarkable extinct animal, the cranial bones of which are found in the Miocene formations of Germany, France, &c. The animal was provided, like the elephant and the walrus, with a pair of long tusks; but these projected from the end of the lower jaw, which is deflected downwards at a right angle to the body of the jaw. Both jaws possessed a series of præ-molars and molars, the crowns of which were traversed by strong transverse ridges. The nasal cavity was large, apparently supplying attachment for a trunk, as in the elephant. Very little is known of the skeleton except the skull (one example of which is 3½ feet long); and hence the true position of the dinotherium has not been satisfactorily determined. Cuvier and Kaup have referred it to the neighbourhood of the tapir, supposing it to have been an inhabitant of large lakes.