any arboreal kangaroo of the genus Dendrolagus, of Queensland, Australia, and New Guinea.
Examples from the web for tree kangaroo
Another highlight of the expedition was the discovery of a population of the golden-mantled tree kangaroo.
British Dictionary definitions for tree kangaroo
tree kangaroo
noun
1.
any of several arboreal kangaroos of the genus Dendrolagus, of New Guinea and N Australia, having hind and forelegs of a similar length and a long tail