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