The Collaborative International Dictionary of English v.0.48:

Babiroussa \Bab`i*rous"sa\, Babirussa \Bab`i*rus"sa\, n. [F.
   babiroussa, fr. Malay b[=a]b[imac] hog + r[=u]sa deer.]
   (Zool.)
   A large hoglike quadruped (Sus babirussa, syn. Porcus
   babirussa) of the East Indies, sometimes domesticated; the
   Indian hog. Its upper canine teeth or tusks are large and
   recurved.
   [1913 Webster]

WordNet (r) 3.0 (2006):

babiroussa
    n 1: Indonesian wild pig with enormous curved canine teeth [syn:
         babirusa, babiroussa, babirussa, Babyrousa
         Babyrussa]