noun, plural wallaroos (especially collectively) wallaroo.
any of several large kangaroos of the genus Macropus (Osphranter ), of the grassy plains of Australia, especially M. robustus, having a reddish-gray coat and inhabiting rocky hills.
Also called euro.

1820–30; < Dharuk wa-la-ru

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World English Dictionary
wallaroo (ˌwɒləˈruː)
n , pl -roos, -roo
a large stocky Australian kangaroo, Macropus (or Osphranter) robustus, of rocky regions
[C19: from native Australian wolarū]

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