sapajoun.[F. sapajou, sajou, Braz. sajuassu.] (Zol.) Any one of several species of South American monkeys of the genus Cebus, having long and prehensile tails. Some of the species are called also capuchins. The bonnet sapajou (C. subcristatus), the golden-handed sapajou (C. chrysopus), and the white-throated sapajou (C. hypoleucus) are well known species. See Capuchin.()