(mathematics) A continued fraction that goes on forever

(humorous) By relying too much on personal judgement or preference, without realizing the limitations of one's reasoning.

Incalculably, exceedingly, or immeasurably minute; vanishingly small. / (mathematics) Of or pertaining to values that approach zero as a limit. / (informal) Very small.

(mathematics) A non-zero quantity whose magnitude is smaller than any positive number (by definition it is not a real number).

(calculus) Differential calculus and integral calculus considered together as a single subject.

(archaic, calculus) calculus / (mathematics, mathematical analysis) a systematic employment of infinitesimals that reduces calculus to algebra; nonstandard analysis.

In an infinitesimal manner. / To an infinitesimal degree.

plural of infinitesimal

(mathematics) conversion or extension to infinitesimal form

The quality of being infinitesimal.