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. A condition in which the number of leukocytes circulating in the blood is abnormally low and which is most commonly due to a decreased production of new cells in conjunction with various infectious diseases or as a reaction to various drugs or other chemicals.eduction of the number of leukocytes in the blood. It is a common manifestation of a number of diseases, especially those caused by viruses, by a severe inflammatory lesion that draws off large numbers of leukocytes, a consumption leukopenia, and by toxins which depress bone marrow function.