myelosclerosis

noun
my·​e·​lo·​scle·​ro·​sis | \ -sklə-ˈrō-səs How to pronounce myelosclerosis (audio) \
plural myeloscleroses\ -​ˌsēz How to pronounce myeloscleroses (audio) \

Medical Definition of myelosclerosis

1 : sclerosis of the bone marrow