Necrosis \Ne*cro"sis\, n. [NL., fr. gr. ?, fr. ? to make dead, to mortify, ? 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.

Source: Webster's Revised Unabridged Dictionary (1913)