n. the process of the production of *lymphocytes, which occurs in the *bone marrow as well as in the lymph nodes, spleen, thymus gland, and gut wall. The precursor cell from which lymphocytes are derived has not yet been identified.
n. the process of the production of white blood cells (leucocytes), which normally occurs in the blood-forming tissue of the *bone marrow. See also granulopoiesis; haemopoiesis; lymphopoiesis; monoblast.... leucopoiesis
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