ecchymosis

This term is a precise medical descriptor for what is commonly known as a bruise. It carries a clinical tone and is used primarily in healthcare settings, pathology reports, and forensic documentation to describe the extravasation of blood into the subcutaneous tissues. While a bruise is a general term, ecchymosis specifically emphasizes the physiological process of capillary rupture and the resulting skin discoloration.

Because it is a technical noun, it follows standard countability rules for medical conditions, though it is frequently used in the singular to describe a specific area of injury. In professional contexts, it is often paired with descriptors of color or size to indicate the age and severity of the trauma.