Dinothere \Di"no*there\, Dinotherium \Di`no*the"ri*um\, n. [NL. dinotherium, fr. Gr. deino`s terrible + qhri`on beast.] (Paleon.) A large extinct proboscidean mammal from the miocene beds of Europe and Asia. It is remarkable for a pair of tusks directed downward from the decurved apex of the lower jaw. [1913 Webster]