The Collaborative International Dictionary of English v.0.48:

Cabassou \Ca*bas"sou\ (k[.a]*b[a^]s"s[=oo]), n. (Zool.)
   A species of armadillo of the genus Xenurus (Xenurus
   unicinctus and Xenurus hispidus); the tatouay. [Written
   also kabassou.]
   [1913 Webster]