The term 'wallaroo' is a type of macropod, which is a marsupial native to Australia. It is closely related to the kangaroo and wallaby, but is larger than the latter and smaller than the former. The scientific name for the wallaroo is Macropus robustus, and its common name is derived from the Aboriginal word 'walaru'. The crossword solution for the term 'wallaroo' is 'euro', which is the currency of the European Union.