Answer: differential

AnswerCrossword Clue
DIFFERENTIALInequality
differentialOf, showing, or depending on a difference; differing or varying according to circumstances or relevant factors
differentialthe product of the derivative of a function of one variable by the increment of the independent variable
differentialOf or relating to a difference in a physical quantity
differentialConstituting a specific difference; distinctive
differentialRelating to infinitesimal differences or to the derivatives of functions