cercocebus

from The Century Dictionary.

• noun A genus of long-tailed Asiatic and African monkeys, of the family Cynopithecidæ, with large cheek-pouches and ischial callosities: formerly often included in the genus Cercopithecus, but more nearly related to the macaques.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun mangabeys