‖Ne‐cro″sis (nē̍‐krō″sĭs), n. [NL., fr. Gr. νέκρωσισ, fr. νεκρuυ̑ν to make dead, to mortify, νεκρόσ a dead body.] 1. (med.) Mortification or gangrene of bone, or the death of a bone or portion of a bone in mass, as opposed to its death by molecular disintegration. See Caries.
2. (Bot.) A disease of trees, in which the branches gradually dry up from the bark to the center.