(calculus) The calculus that deals with instantaneous rates of change.

An arrangement of bevel gears permitting the rotation of two shafts at two different speeds whilst supplying the same torque; used on the drive axles or between the driven wheels of automobiles to aid cornering.

(calculus) an equation involving the derivatives of a function

plural of differential thermometer

A thermometer for gauging very small differences in temperature.

plural of differential screw

(mechanics) A type of differential gear used in automobile construction, allowing for output shafts to have different angular velocity, while equalizing torque applied to each output shaft.

(engineering) A mechanism that uses two screw threads to make small, precise adjustments to the spacing between two objects, as in focusing a microscope or moving the anvils of a micrometer.

A branch of psychology focusing on how and why individuals differ in their behaviour.

(mathematics, mathematical analysis) An operator defined as a function of the differentiation operator (the operator which maps functions to their derivatives).