Search Result for "lymphopoiesis": 
Wordnet 3.0

NOUN (1)

1. the formation of lymphocytes in the bone marrow and lymph nodes and thymus and spleen; 



WordNet (r) 3.0 (2006):

lymphopoiesis
    n 1: the formation of lymphocytes in the bone marrow and lymph
         nodes and thymus and spleen