adverb
- in a way that is immeasurably or incalculably small; by an amount so tiny it is almost negligible
Usage: commonly used in mathematics, physics, and everyday language to describe extremely small differences or changes
Examples
- The temperature increased infinitesimally over the course of an hour.
- The two measurements differed infinitesimally, so we considered them equal.
- In calculus, we study how functions change infinitesimally.
- The probability of that event occurring is infinitesimally small.
- The adjustment to the microscope was infinitesimal, moving the lens just a fraction of a millimeter.
- Her mood improved infinitesimally after hearing the good news.