white-blood-cell

This term is primarily used in medical and biological contexts to describe the leukocytes of the immune system. It carries a neutral, scientific connotation and is the standard terminology for clinical discussions regarding infection, immunity, and blood analysis.

In a clinical setting, the term is frequently used in the compound "white-blood-cell count," which serves as a diagnostic marker. While "leukocyte" is the precise technical synonym used in academic pathology, "white-blood-cell" is the preferred term for patient communication and general healthcare contexts.