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

baboon \baboon"\, n. oe. babewin, baboin, fr. f. babouin, or
   ll. babewynus. of unknown origin; cf. d. baviaan, g. pavian,
   baboon, f. babine lip of ape, dogs, etc., dial. g. baumppe
   mouth. zool.
   one of the old world quadrumana, of the genera cynocephalus
   and papio; the dog-faced ape. baboons have dog-like muzzles
   and large canine teeth, cheek pouches, a short tail, and
   naked callosities on the buttocks. they are mostly african.
   see mandrill, and chacma, and drill an ape.
   1913 webster
see also:
cynocephalus papio mandrill chacma drill 

[2] : WordNet (r) 2.0

baboon
     n : large terrestrial monkeys having doglike muzzles

Baboon >> B Words
Baboon, definition of term: Baboon
baboon_pag1.html