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.
Myelination consists of multiple layers of the cell membrane of either oligodendrocytes or Schwann cells (neurolemmocytes) wrapped around the axons of neurons. The cell membrane wrapping is called myelin. A number of glial cells are necessary to form the myelination along the length of an axon.