Noun | 1. | Cercopithecidae - Old World monkeys: guenon; baboon; colobus monkey; langur; macaque; mandrill; mangabey; patas; proboscis monkey mammal family - a family of mammals Anthropoidea, suborder Anthropoidea - monkeys; apes; hominids catarrhine, Old World monkey - of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together Cercopithecus, genus Cercopithecus - type genus of the Cercopithecidae: guenons Cercocebus, genus Cercocebus - mangabeys Erythrocebus, genus Erythrocebus - patas genus Papio, Papio - baboons genus Mandrillus, Mandrillus - baboons genus Macaca, Macaca - macaques; rhesus monkeys genus Colobus - a genus of Cercopithecidae genus Nasalis, Nasalis - proboscis monkeys |