Definition of "wallaroo" [wal•la•roo]

• A large kangaroo (Macropus robustus) having reddish or gray fur and living in the hilly regions of Australia. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The mammals include a number of well-known animals such as the eastern grey kangaroo Macropus giganteus, the red-necked wallaby M. rufogriseus, wallaroo M. robustus, koala Phasocarctos cinereus and wombat Vombatus ursinus, the greater glider Petaurus volans, the squirrel glider P. norfolcensis, mountain brushtailed possum Trichosurus caninus; also the rarer spotted-tailed quoll Dasyurus maculatus (VU), long-nosed potoroo Potorous tridactylus (VU), yellow-bellied glider Petaurus australis and brush-tailed rock wallaby Petrogale penicillata (VU)."
• "It has not yet been determined by baraminologists whether kangaroos form a holobaramin with the wallaby, tree-kangaroo, wallaroo, pademelon and quokka, or if all these species are in fact apobaraminic or polybaraminic."
• "The wallaroo can reach heights of 55 inches, enjoys rock climbing and grass and shrubs."