reticuloendotheliosis

noun
re·​tic·​u·​lo·​en·​do·​the·​li·​o·​sis | \ -ˌthē-lē-ˈō-səs How to pronounce reticuloendotheliosis (audio) \
plural reticuloendothelioses\ -​ˌsēz How to pronounce reticuloendothelioses (audio) \

Medical Definition of reticuloendotheliosis

: any of several disorders characterized by proliferation of phagocytic cells (as macrophages)

called also reticulosis