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Definition of infinitesimally

infinitesimally

/ˌɪn.fɪ.nɪˈtɛs.ɪ.mə.li/
in · fin · i · tes · i · mal · ly
Adjective:infinitesimal
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infinitesimally Lexical Profile

infinitesimally Game Scores & Validity

• adverb

1

To an extremely or immeasurably small degree; in a manner that is almost imperceptible.

Example

"The odds of two snowflakes forming the exact same molecular structure are infinitesimally small."

Synonyms
View all synonyms for infinitesimally
Antonyms
View all antonyms for infinitesimally

• Nearby Words

infinite
infinitely
infiniteness
infinitesimally
infinitive
infinity
infirm

Word Origin & Etymology

Formed from the adjective infinitesimal plus the adverbial suffix -ly; infinitesimal derives from New Latin infinitesimus ('infinite-eth'), modeled on Latin centesimus ('hundredth') to denote an infinitely small fraction in early calculus.

Cite this Entry

Wordmom. (2026). Definition of Infinitesimally. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infinitesimally
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