1. Plural of catarrhine; primates of the infraorder Catarrhini, characterized by downward-facing nostrils, including Old World monkeys, apes, and humans.
Usage: scientific/zoological term; also used as singular collective noun

Examples

• Catarrhines are distinguished from platyrrhines by their narrow nasal septum.
• Humans, chimpanzees, and macaques are all catarrhines.
• The evolution of catarrhines is well documented in the fossil record.
• Catarrhines originated in Africa and later spread to Europe and Asia.
• Most catarrhines live in tropical and subtropical regions.