myelopoiesis

noun
my·​e·​lo·​poi·​e·​sis | \ ˌmī-ə-lō-(ˌ)pȯi-ˈē-səs How to pronounce myelopoiesis (audio) \
plural myelopoieses\ -​ˈē-​ˌsēz How to pronounce myelopoieses (audio) \

Medical Definition of myelopoiesis

1 : production of bone marrow or bone marrow cells
2 : production of blood cells in bone marrow especially : formation of blood granulocytes