| Noun | 1. | fibrous dysplasia of bone - a disturbance in which bone that is undergoing lysis is replaced by an abnormal proliferation of fibrous tissue resulting in bone lesions or skin lesions dysplasia - abnormal development (of organs or cells) or an abnormal structure resulting from such growth Albright's disease, polyostotic fibrous dysplasia - fibrous dysplasia of bone affecting multiple bones monostotic fibrous dysplasia - fibrous dysplasia of bone confined to a single bone |