noun Ar·si·noi·the·ri·um \ˌärsəˌnȯiˈthirēəm\

Definition of Arsinoitherium

  1. :  a genus of extinct mammals (order Embrithopoda) of the Oligocene of Egypt having limbs resembling those of the elephant and a pair of large horns

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Origin and Etymology of arsinoitherium

New Latin, irregular from Arsinoë II †271 b.c. queen of Egypt + New Latin -therium

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to cast off or become cast off

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