[1] : The Collaborative International Dictionary of English v.0.48

bonobo \bono"bo\ b-on=o"b=o, n.
   an anthropoid ape pan paniscus, resembling but smaller
   than the common chimpanzee pan troglodytes; -- called
   also pygmy chimpanzee. it is found in the forests of zaire.
   its genome is the closest known to humans, differing by less
   than 2 in nucleotide sequence.

   syn: pygmy chimpanzee, pygmy chimp.
        pjc
see also:
pan paniscus pan troglodytes pygmy chimpanzee 

[2] : WordNet (r) 2.0

pygmy chimpanzee
     n : small chimpanzee of swamp forests in zaire; a threatened
         species syn: bonobo, pan paniscus
see also:
bonobo pan paniscus 

Pygmy >> P Words
Pygmy, definition of term: Pygmy
pygmy_pag1.html

Chimpanzee >> C Words
Chimpanzee, definition of term: Chimpanzee
chimpanzee_pag1.html