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.
Although leukoplakia itself isn't dangerous, it sometimes shows precancerous changes that can lead to mouth cancer. Definition. Leukoplakia (loo-ko-PLAY-key-uh) is a condition in which thickened, white patches form on your gums, the insides of your cheeks, the bottom of your mouth and, sometimes, your tongue.