What is the medical term for an area of dead tissue resulting from a lack of blood supply?

The medical term for an area of dead tissue that occurs due to a lack of blood supply is "infarct." An infarct typically arises when blood flow is obstructed, often through a thrombus or embolus, leading to cellular death and tissue necrosis in the affected area. This lack of blood supply deprives the tissue of essential nutrients and oxygen, resulting in death of the cells in that region.

In contrast, ischemia refers to a reduction in blood supply to an organ or tissue, which can lead to an infarct if the blood supply is not restored in time. Hypoxia relates specifically to low oxygen levels in the tissue but does not necessarily mean the tissue is dead; tissues can experience hypoxia without being infarcted as long as they are still receiving some blood flow. A laceration is a physical injury that cuts through skin or tissue but does not specifically refer to dead tissue resulting from blood supply issues. Thus, infarct is the precise term for the condition described in the question.