n 1  :  an eczematous inflammatory condition esp. of the nipple and areola that is the epidermal manifestation of an underlying carcinoma  2  :  a chronic disease of bones characterized by their great enlargement and rarefaction with bowing of the long bones and deformation of the flat bones - called also osteitis deformans , osteodystrophia deformans  .
 
 
 
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