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.
A low white blood cell count is known as leukopenia. This condition can be a symptom of a number of diseases, such as lupus or liver disease, or can be among the effects of radiation therapy.