infinitesimal

Immeasurably or incalculably minute.

Capable of having values approaching zero as a limit.

An immeasurably or incalculably minute amount or quantity.

A function or variable continuously approaching zero as a limit.

Infinitely or indefinitely small; less than any assignable quantity.

In mathematics, a fictitious quantity so small that by successive additions to itself no sensible quantity, such as the unit of quantity, could ever be generated.

Infinitely or indefinitely small; less than any assignable quantity or value; very small.

the different and the integral calculus, when developed according to the method used by Leibnitz, who regarded the increments given to variables as infinitesimal.

An infinitely small quantity; that which is less than any assignable quantity.

Incalculably, exceedingly, or immeasurably minute; vanishingly small.