The Collaborative International Dictionary of English v.0.48:

Catarrhine \Cat"ar*rhine\, n. [Gr. kata`rris with hanging or
   curved nose; kata` down + "ri`s, "rino`s nose.] (Zool.)
   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]

WordNet (r) 3.0 (2006):

catarrhine
    adj 1: of or related to Old World monkeys that have nostrils
           together and opening downward [syn: catarrhine,
           catarrhinian] [ant: broadnosed, leptorhine,
           leptorrhine, leptorrhinian, leptorrhinic,
           platyrhine, platyrhinian, platyrrhine,
           platyrrhinian, platyrrhinic]
    n 1: of Africa or Arabia or Asia; having nonprehensile tails and
         nostrils close together [syn: Old World monkey,
         catarrhine]