Source : Webster's Revised Unabridged Dictionary (1913)

Platyrhini \Plat`y*rhi"ni\, n. pl. [NL., fr. Gr. ? broad + ?, ?,
   nose.] (Zo["o]l.)
   A division of monkeys, including the American species, which
   have a broad nasal septum, thirty-six teeth, and usually a
   prehensile tail. See {Monkey}. [Written also {Platyrrhini}.]

Source : WordNet®

Platyrrhini
     n : New World monkeys: capuchin; douroucouli; howler monkey;
         saki; spider monkey; squirrel monkey; titi; uakari;
         woolly monkey; marmoset; tamarin [syn: {superfamily
         Platyrrhini}]