| primitive erythroblast | <cell biology> Large cell with euchromatic nucleus found in mammalian embryos. In the mouse, the cells are located in the yolk sac and are responsible for early production of erythrocytes with foetal haemoglobin. (18 Nov 1997) |
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| definitive erythroblast | <haematology, pathology> Embryonic erythroblast found in the liver, smaller than primitive erythroblasts, they lose their nucleus at the end of the maturation cycle and produce erythrocytes with adult haemoglobin. (18 Nov 1997) |
| erythroblast | <haematology> Rather noncommittal name for a nucleated cell of the bone marrow that gives rise to erythrocytes. See: normoblasts, BFU E, CFU E, primitive and definitive erythroblasts (18 Nov 1997) |