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.
Osteopenia is a bone condition characterized by bone loss that is not as severe as in osteoporosis. Read about treatment, symptoms, causes, diagnosis, medications, and prevention information.