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melo·rhe·os·to·sis | \ ˌmel-ə-ˌrē-äs-ˈtō-səs 
\
\ plural melorheostoses\ -ˌsēz \ or melorheostosises
\ or melorheostosisesMedical Definition of melorheostosis
: an extremely rare form of osteosclerosis of unknown etiology characterized by asymmetrical or local enlargement and sclerotic changes in the long bones of one extremity
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