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a form of acquired immunity in which the body produces its own antibodies against disease-causing antigens

the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation

an old term for an electric generator that produces alternating current (especially in automobiles)

an old term for an electric generator that produces alternating current (especially in automobiles)

an old term for an electric generator that produces alternating current (especially in automobiles)