Source : Webster's Revised Unabridged Dictionary (1913)

Wallaby \Wal"la*by\, n.; pl. {Wallabies}. [From a native name.]
   (Zo["o]l.)
   Any one of numerous species of kangaroos belonging to the
   genus {Halmaturus}, native of Australia and Tasmania,
   especially the smaller species, as the brush kangaroo ({H.
   Bennettii}) and the pademelon ({H. thetidis}). The wallabies
   chiefly inhabit the wooded district and bushy plains.
   [Written also {wallabee}, and {whallabee}.]