recurrence

This term carries a clinical or formal tone, often appearing in medical reports to describe the return of a disease or in economic reports to describe the return of a financial crisis. It suggests a cycle where a previously resolved or dormant issue resurfaces, often implying a sense of caution or alarm. In mathematical contexts, the word shifts from a temporal event to a structural rule. Here, it describes a specific logical dependency where a term is derived from its predecessors, moving the meaning from a random event to a predictable, governed pattern.