Erythroblast Erythroblast Cell C12527 Nucleated RBC C0014762 Nucleated Red Cell Nucleated Erythrocytes Erythroblasts An immature, nucleated erythrocyte occupying the stage of erythropoiesis that follows formation of erythroid progenitor cells and precedes formation of reticulocytes. Erythroblast Nucleated Red Blood Cells Erythroblast Nucleated Red Blood Cell Erythroblast Nucleated Erythrocyte Nucleated Red Cells Myeloid Cell Hematopoietic Blast Cell