An extinct South American hoofed mammal resembling a horse or camel, found from the Palaeocene to the Pleistocene epochs.
- Order Litopterna: several families
More example sentences
- Many strange mammals - litopterns, notoungulates, ground sloths, borhyeanas, etc - continued to evolve in isolation in South America before a land bridge formed and allowed a devastating invasion of forms from the north.
early 20th century: from modern Latin Litopterna, from Greek litos 'smooth' + pternē 'heel bone'.
Definition of litoptern in:
- The US English dictionary