- In zoology, platyrrhine, as a monkey.
- In anthropology, having wide flat nasal bones, as people, a people, or a skull.
- A platyrrhinian animal, person, or skull.
- hairy-faced arboreal monkeys having commonly divided nostrils and lengthy usually prehensile tails
- of or regarding New World monkeys having nostrils far apart or even individuals with broad noses