Noun
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.
Source: Webster's dictionaryA man sat on a rock and sought Refreshment from his thumb; A dinotherium wandered by And scared him some. His name was Smith. The kind of rock He sat upon was shale. One feature quite distinguished him- He had a tail. David Law Proudfit