Myeloblast

**Semantic type:** Cell

**Definition:** An immature cell that represents the first stage in the granulocytic series of hematopoiesis. It is found in bone marrow and differentiates into a promyelocyte. Its nucleus is composed of very fine, evenly distributed chromatin with 2-5 nucleoli. The cytoplasm is basophilic and non-granular.

**Synonyms:** - myeloblastic