Dictionary.net

• Any one of several species of kangaroos of the genus Macropus, especially M. robustus, sometimes called the great wallaroo.

2010 - New Age Dictionary Database
By Oddity Software

• Any one of several species of kangaroos of the genus Macropus, especially M. robustus, sometimes called the great wallaroo.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.