What are examples of landforms? A: The four main types of landforms are mountains, plateaus, plains and hills. A landform is defined as any natural feature on the Earth's surface, which incl... Full Answer >
Definition of leukopenia. : a condition in which the number of white blood cells circulating in the blood is abnormally low.
Definition. A low white blood cell count, or leukopenia, is a decrease in disease-fighting cells (leukocytes) circulating in your blood.The threshold for a low white blood cell count varies from one medical practice to another.Some healthy people have white cell counts that are lower than what's considered normal.efinition. A low white blood cell count, or leukopenia, is a decrease in disease-fighting cells (leukocytes) circulating in your blood.