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Definition: In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = (pi)r2, A is the dependent variable, as its value depends on the value of the radius (r).
Source: The American Heritage Science Dictionary. Boston: Houghton Mifflin, 2005. Credo Reference. Web. 07 August 2012.