The International Code of Zoological Nomenclature (ICZN) is a set of rules and guidelines that govern the naming of animals. It is a key document for zoologists, taxonomists, and other scientists working in the field. There are a number of synonyms for ICZN that can be used in different contexts, including the International Code of Zoological Nomenclature Code, the ICZN Code, and the Zoological Code. These terms all refer to the same set of rules and regulations, and are interchangeable depending on the situation. Overall, the ICZN is a vital tool for anyone involved in the classification and study of animals, ensuring consistency and clarity in this important scientific field.