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.
Leukopenia is a decreased number of white blood cells. A person is said to have leukopenia when the total white blood cell count falls below 4,000 white blood cells per microliter of blood. There are basically two types of leukopenia. The main type is neutropenia, which is a decreased number of neutrophils.