WordNet (r) 3.0 (2006):

white ash
    n 1: small to medium-sized tree of Australia and Tasmania having
         smooth white to light-grey bark shedding in patches or
         strips [syn: snow gum, ghost gum, white ash,
         Eucalyptus coriacea, Eucalyptus pauciflora]
    2: spreading American ash with leaves pale green or silvery
       beneath and having hard brownish wood [syn: white ash,
       Fraxinus Americana]