Quadrumana

‖n. pl. [ NL. See Quadrumane. ] (Zool.) A division of the Primates comprising the apes and monkeys; -- so called because the hind foot is usually prehensile, and the great toe opposable somewhat like a thumb. Formerly the Quadrumana were considered an order distinct from the Bimana, which last included man alone. [ 1913 Webster ]