Source : Webster's Revised Unabridged Dictionary (1913)

Necrobiosis \Nec`ro*bi*o"sis\, n. [NL., fr. Gr. ? dead + ? way
   of life, fr. ? life.] (Biol. & Med.)
   The death of a part by molecular disintegration and without
   loss of continuity, as in the processes of degeneration and
   atrophy.

Source : WordNet®

necrobiosis
     n : (physiology) the normal degeneration and death of living
         cells (as in various epithelial cells) [syn: {cell death}]