australasian

from WordNet (r) 3.0 (2006)

Australasian
    adj 1: relating to or found in Australasia

from The Collaborative International Dictionary of English v.0.48

Australasian \Aus`tral*a"sian\, a.
   Of or pertaining to Australasia; as, Australasian regions. --
   n. A native or an inhabitant of Australasia.
   [1913 Webster]