differential

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.

The result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx.

A quality that differentiates between similar things.

Involving or containing one or more derivatives.

“differential equation”

Relating to or showing a difference.

“differential treatment”