deinotherium

 
Pronunciation: /ˌdʌɪnə(ʊ)ˈθɪərɪəm/
(also deinothere /ˈdʌɪnə(ʊ)θɪə/)

noun (plural deinotheria or deinotheriums)

  • a fossil elephant-like mammal found mainly in the Pliocene epoch, that had tusks in the lower jaw that curved downwards and backwards.
    • Genus Deinotherium, suborder Deinotherioidea, order Proboscidea

Origin:

modern Latin, from Greek deinos 'terrible' + thērion 'wild beast'