Noun | 1. | lymphocytic leukemia - leukemia characterized by enlargement of lymphoid tissues and lymphocytic cells in the circulating blood cancer of the blood, leucaemia, leukaemia, leukemia - malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer lymphoblastic leukemia - a form of lymphocytic leukemia in which the abnormal cells in the circulating blood are almost totally lymphoblasts |