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.
The histological features of granuloma annulare are: 1  Normal epidermis. 2  Central foci of dermal collagen degeneration (necrobiosis) and mucin accumulation. 3  Palisading of histiocytes. 4  Multinucleate giant cells. 5  Single-filing of inflammatory cells between collagen bundles (âbusyâ dermis).