One of the Catarrhina, a division of Quadrumana, including the Old World monkeys and apes which have the nostrils close together and turned downward. See Monkey. [1913 Webster]
, adj. & n. Zool.
--adj. (of primates) having nostrils close together, and directed downwards, e.g. a baboon, chimpanzee, or human.
--n. such an animal (cf. PLATYRRHINE).