What is the term for an area of dead tissue after a lack of blood supply?

The term for an area of dead tissue resulting from a lack of blood supply is "infarct." An infarct occurs when blood flow to a particular area is obstructed, typically due to a blockage in the blood vessels. This obstruction causes the tissue to become oxygen-deprived and ultimately lead to cell death.

Ischemia refers to a reduced blood supply to a tissue, which can lead to infarction if prolonged. While ischemia is a critical process that precedes infarction, it does not itself describe the area of dead tissue that results.

Melena is related to the passage of black, tarry stools due to digested blood, which is not pertinent to the concept of tissue death caused by a lack of blood supply.

Laceration refers to a tear or a cut in the tissue, which is unrelated to the vascular conditions that cause tissue necrosis.

In summary, an infarct specifically denotes the localized area of tissue death due to ischemia or insufficient blood flow, making it the correct term in this context.