infinitesimally
/ˌɪnfɪnɪˈtɛsɪməli/
adverb
- In an extremely small or tiny amount; to a degree that is almost impossible to measure or notice.
- Over millions of years, the continents move infinitesimally, shifting only a few centimeters each year.
- She adjusted the microscope's focus infinitesimally until the cell structure came into perfect view.
- The difference between the two measurements was infinitesimally small, barely detectable by the most sensitive instruments.
Antonyms