1. Adjective.  Incalculably, exceedingly, or immeasurably minute; vanishingly small.
  2. Adjective.  (mathematics) Of or pertaining to values that approach zero as a limit.
  3. Adjective.  (informal) Very small.
  4. Noun.  (mathematics) A non-zero quantity whose magnitude is smaller than any positive number (by definition it is not a real number).

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This entry was last updated on RefTopia from its source on 3/20/2012.