deviation
de.vi.a.tion \.de--ve--'a--sh*n\ \-sh*-.niz-*m\ \-sh(*-)n*st\ n : an act or instance of deviating : as : deflection of the needle of a compass caused by local magnetic influenc es (as in a ship) : the difference between a value in frequency distribution and a fixed nu mber : evolutionary differentiation involving interpolation of new stages in t he ancestral pattern of morphogenesis : departure from an established ideology or party line : noticeable or marked departure from accepted norms of behavior - de.vi.a.tion.ism n
Webster's English Dictionary