Source : Webster's Revised Unabridged Dictionary (1913)

Guereza \Gue*re"za\, n. (Zo["o]l.)
   A beautiful Abyssinian monkey ({Colobus guereza}), having the
   body black, with a fringe of long, silky, white hair along
   the sides, and a tuft of the same at the end of the tail. The
   frontal band, cheeks, and chin are white.

Source : WordNet®

guereza
     n : a colobus monkey with a reddish brown coat and white silky
         fringes down both sides of the body [syn: {Colobus
         guereza}]