phacomatosis

noun
phaco·​ma·​to·​sis | \ ˌfak-ō-mə-ˈtō-səs How to pronounce phacomatosis (audio) \
plural phacomatoses\ -​ˌsēz How to pronounce phacomatoses (audio) \

Medical Definition of phacomatosis

: any of a group of hereditary or congenital diseases (as neurofibromatosis) affecting the central nervous system and characterized by the development of hamartomas

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