Source : Webster's Revised Unabridged Dictionary (1913)

Guenon \Guenon"\, n. [F.] (Zo["o]l.)
   One of several long-tailed Oriental monkeys, of the genus
   {Cercocebus}, as the green monkey and grivet.

Source : WordNet®

guenon
     n : small slender African monkey having long hind limbs and tail
         and long hair around the face [syn: {guenon monkey}]