Mathematics. Originally: a notional infinitesimally small change in the value of a varying quantity. In later use chiefly: the product of the…

Mathematics. In Newtonian calculus: the increment in the value of a time-varying quantity that occurs in an infinitesimal period of time; = differe…

Mathematics. = moment, n. 3b. rare.

Mathematics and Physics. A small (or sometimes infinitesimal) amount by which a variable quantity increases (e.g. in a given small time); spec. the…

Mathematics. An infinitesimal part of a magnitude of any kind; a differential.

Mathematics. = moment, n. 3b. Obsolete. rare.

Mathematics. In the differential calculus, h is used to denote a small increment.

Physics. A quantity ds, invariant under the Lorentz transformation, that represents the separation of two events in space-time and is defined by ds…

The differential of a differential. rare.