ne·cro·sis 
(nə-krōsĭs, nĕ-)
(nə-krōsĭs, nĕ-)n. pl. ne·cro·ses (-sēz′)
Death of cells through injury or disease, especially in a localized area of a tissue or organ.
[Late Latin necrōsis, a causing to die, killing, from Greek nekrōsis, death, from nekroun, to make dead, from nekros, corpse; see nek-1 in the Appendix of Indo-European roots.]
ne·crotic (-krŏtĭk) adj.