from
The Collaborative International Dictionary of English v.0.48
Baboon \Bab*oon"\, 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. b[aum]ppe
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]