1. Plural of infraorder; taxonomic ranks that fall below the order level in biological classification, used to group families or subfamilies within an order.
Usage: technical; biology; taxonomy

Examples

• The order Primates is divided into several infraorders, including Haplorhini and Strepsirrhini.
• Infraorders provide a finer level of classification than orders but broader than families.
• Biologists use infraorders to organize the diversity of mammals more precisely.
• The infraorders within Carnivora help distinguish between different groups of carnivorous mammals.