Infinitesimal Definition

ĭnfĭn-ĭ-tĕsə-məl
adjective
Immeasurably or incalculably minute.
American Heritage
Too small to be measured.
Webster's New World
Of or pertaining to an infinitesimal.
Webster's New World
Capable of having values approaching zero as a limit.
American Heritage Science
noun
An infinitesimal quantity.
Webster's New World
A variable that approaches zero as a limit.
Webster's New World

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

Wiktionary

Other Word Forms of Infinitesimal

Noun

Singular:
infinitesimal
Plural:
infinitesimals

Origin of Infinitesimal

  • From New Latin īnfīnītēsimus infinite in rank from Latin īnfīnītus infinite infinite

    From American Heritage Dictionary of the English Language, 5th Edition

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