অর্থ : The result of mathematical differentiation. The instantaneous change of one quantity relative to another. Df(x)/dx.

অর্থ : A quality that differentiates between similar things.

অর্থ : A bevel gear that permits rotation of two shafts at different speeds. Used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves.

অর্থ : Relating to or showing a difference.

অর্থ : Involving or containing one or more derivatives.