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Adjective: infinitesimal  ,in-fi-ni'te-su-mul
  1. Infinitely or immeasurably small
    - minute
Noun: infinitesimal  ,in-fi-ni'te-su-mul
  1. (mathematics) a variable that has zero as its limit

Derived forms: infinitesimals

See also: little, small

Type of: variable, variable quantity

Encyclopedia: Infinitesimal