| pelvospondylitis ossificans | Deposit of bony substance between the vertebrae of the sacrum. Origin: L. Pelvis, basin, + G. Spondylos, vertebra, + -itis; L. Os, bone, + facio, to make (05 Mar 2000) |
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| myositis ossificans | A disease characterised by bony deposits or the ossification of muscle tissue. (12 Dec 1998) |
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| myositis ossificans circumscripta | Local deposit of bone in a muscle, usually following prolonged trauma; e.g., riders' bone. (05 Mar 2000) |
| myositis ossificans progressiva | <radiology> Progressive skeletal fusion, ossification of ligaments, nuchal ligament, pelvic entheses, asymptomatic at birth, 90% have short great toes (12 Dec 1998) |
| lipoma ossificans | A lipoma in which metaplasia occurs and small foci of bone are formed. (05 Mar 2000) |