myelopoiesis
/ˌmʌɪələ(ʊ)pɔɪˈiːsɪs/Physiology and Medicine
noun
The formation and development of bone marrow cells, or of blood cells derived from these (haematopoiesis); specifically the formation and development of granulocytes.
Origin
1930s; earliest use found in Webster's New International Dictionary of the English Language. From myelo- + -poiesis, probably after German Myelopoëse.