osteitis fibrosa
noun
osteitis fi·bro·sa
| \ -fī-ˈbrō-sə
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Medical Definition of osteitis fibrosa
: a disease of bone that is characterized by fibrous degeneration of the bone and the formation of cystic cavities and that results in deformities of the affected bones and sometimes in fracture
— called also osteodystrophia fibrosa