What is the medical term for the splitting of skin due to trauma?

The term that specifically refers to the splitting or tearing of the skin due to trauma is "laceration." A laceration is characterized by a jagged or irregular wound that results from blunt force or an object cutting through the skin, leading to an injury that may vary in depth and severity. This term captures the essence of skin damage caused by an external force, making it the most accurate descriptor for such injuries.

In contrast, melena refers to black, tarry stools indicative of gastrointestinal bleeding, myalgia describes muscle pain, and infarct pertains to localized tissue death due to inadequate blood supply. None of these terms relate to skin trauma, underscoring why laceration is the correct medical terminology for the condition described in the question.