Dictionary.net

• An extinct Quaternary marsupial from Australia, about as large as the hippopotamus; - so named because of its two large front teeth. See Illustration in Appendix.

2010 - New Age Dictionary Database
By Oddity Software

• An extinct Quaternary marsupial from Australia, about as large as the hippopotamus; - so named because of its two large front teeth. See Illustration in Appendix.

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