any of various small and medium-sized herbivorous marsupials (family Macropodidae) that are very similar to kangaroos
See wallaby in American Heritage Dictionary 4
(wŏlˈə-bē)
nounpl.wal·la·bies or wallaby
Any of various marsupials of the genus Wallabia and related genera, of Australia and adjacent islands, related to the kangaroos but generally smaller and often having a colorful coat.