platyrrhinian adj 1: of or related to New World monkeys having nostrils far apart or to people with broad noses [syn: {platyrrhine}, {platyrrhinian}, {platyrhine}, {platyrhinian}, {platyrrhinic}, {broadnosed}] [ant: {catarrhine}, {catarrhinian}, {leptorhine}, {leptorrhine}, {leptorrhinian}, {leptorrhinic}] n 1: hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails [syn: {New World monkey}, {platyrrhine}, {platyrrhinian}]