osteolysis

from WordNet (r) 3.0 (2006)

osteolysis
    n 1: lysis of bone caused by disease or infection or inadequate
         blood supply

from The Collaborative International Dictionary of English v.0.48

Osteolysis \Os`te*ol"y*sis\, n. [NL. osteo- + Gr. ly`sis a
   loosing.]
   Softening and absorption of bone. -- {Os`te*o*lyt"ic}, a.
   [Webster 1913 Suppl.]