Definition from Wiktionary, the free dictionary
- (obsolete) A taxonomic division within the order 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.
1871, Charles Darwin, Descent of Man:
- WITH mankind the differences between the sexes are greater than in most of the Quadrumana, but not so great as in some, for instance, the mandrill.