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necrosis ne·cro·sis (nə-krō'sĭs, ně-)
n. pl. ne·cro·ses (-sēz')
Death of cells or tissues through injury or disease, especially in a localized area of the body.
death of a circumscribed area of plant or animal tissue as a result of an outside agent; natural death of tissue is called necrobiosis. Necrosis may follow a wide variety of injuries, both physical (cuts, burns, bruises) and biological (effects of disease-causing agents). The sign of necrosis-dead tissue-is called a lesion; it is often of diagnostic value. Necrosis is brought about by intracellular enzymes that are activated upon injury and proceed to destroy damaged cells