(Myeloblastic): Immature non-lymphocyte type white blood cells. It is normally seen only in the bone marrow. In some diseases, such as leukemia, myeloblasts may appear in the blood. Healthy myeloblasts will develop into granulocytes.

The parent cell of the granulocytic or myelocytic series.

a precursor of leukocytes that normally occurs only in bone marrow