an Old World monkey, Mandrillus sphinx, of W Africa. It has a short tail and brown hair, and the ridged muzzle, nose, and hindquarters are red and blue
Word origin
C18: from man + drill4
mandrill in American English
(ˈmændrɪl)
noun
a large, fierce, strong baboon (Mandrillus sphinx) of W Africa: the male has blue and scarlet patches on the face and rump