n. 坏死, 枯斑

[医] 坏死

[ noun ]
the localized death of living cells (as from infection or the interruption of blood supply)
<noun.phenomenon>

Necrosis \Ne*cro"sis\ (n[-e]*kr[=o]"s[i^]s), n. [NL., fr. Gr.
ne`krwsis, fr. nekruy^n to make dead, to mortify, nekro`s a
dead body.]
1. (Med.) The pathologic death of part of a tissue due to
irreversible damage. Contrast to {necrobiosis}, which is a
normal death of cells in a tissue. Formerly, applied
primarily to death of bone tissue.
[1913 Webster +PJC]

2. (Bot.) A disease of trees, in which the branches gradually
dry up from the bark to the center.