blast cell n an immature cell esp a usu. large blood cell precursor that is in the earliest stage of development in which it is recognizably committed to development along a particular cell lineage
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1. blast1 (def. 1). 2. in the monophyletic theory, the least differentiated, totipotential blood cell without commitment as to its particular series, from which all blood cells are derived, preceding a stem cell. Called also blast, hematoblast, hematocytoblast, hemoblast, and hemocytoblast.Medical dictionary. 2011.