nomenclature

noun

• the devising or choosing of names for things, especially in a science or other discipline: the Linnean system of zoological nomenclature the most important rule of nomenclature is that the name of a substance should be unambiguous
• the body or system of names used in a particular specialist field: the students found it hard to decipher the nomenclature of chemical compounds
• formal the term or terms applied to someone or something:‘customers’ was preferred to the original nomenclature ‘passengers’