DEFINITION of 'Windfall Tax'. A tax levied by governments against certain industries when economic conditions allow those industries to experience above-average profits. Windfall taxes are primarily levied on the companies in the targeted industry that have benefited the most from the economic windfall, most often commodity-based businesses.
acute leukemia leukemia in which the involved cell line shows little or no differentiation, usually consisting of blast cells; two types are distinguished, acute lymphoblastic leukemia and acute myelogenous leukemia. acute granulocytic leukemia acute myelogenous leukemia.
oligodendrocyte. Oligodendrocytes, also known as oligodendroglia, belong to a class of cells in the central nervous system known as glial cells. Oligodendrocytes are responsible for producing a fatty protein, called myelin, which insulates axons, the long extensions of nerve cells (neurons) . In acute MS lesions, typical of very aggressive disease courses, oligodendrocytes are found in large numbers and there is evidence of abortive remyelination-probably the new myelin is being destroyed faster than the oligodendrocytes can lay it down.