myelopoiesis trait Trait.ontology myeloid cell differentiation Any measurable or observable characteristic related to the formation of myeloid cells from the pluripotent hematopoietic stem cells in the bone marrow via myeloid stem cells, including the production of leukocytes in blood, such as monocytes and granulocytes, and precursor cells for macrophages and dendritic cells found in the lymphoid tissue. myeloid cell development trait VT:0001601 leukopoiesis trait