A "nomen" is a Latin term that translates to "name" in English. In ancient Roman society, it referred specifically to the second part of a person's full name, which identified their family or clan. For example, in the name Gaius Julius Caesar, "Julius" is the nomen, indicating his family lineage. In modern contexts, "nomen" can also refer to the concept of naming in general, encompassing various fields such as linguistics and taxonomy. In biology, for instance, the nomenclature system helps classify and name living organisms, ensuring that each species has a unique and universally accepted name.