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.
Arachnoid[ edit | edit source] It is a thin avascular membrane, derived from the endomeninx. Encephalic arachnoid: in the superior sagittal sinus, the arachnoid gives off extensions into the superior sagittal sinus and into the diploic vessels in the periosteum. These extensions are called arachnoidal granulations. They are involved in draining the CSF from the subarachnoid cavities into the venous system.