quintillion

  1. Cardinal number.  (US, modern British & Australian, w:Long and short scales) A [[billion billion: 1 followed by eighteen zeros, 1018.
  2. Cardinal number.  (dated, British & Australian, w:Long and short scales) A [[million quadrillion: 1 followed by 30 zeros, 1030.
  3. Noun.  (figuratively, slang) Any very large number, exceeding normal description.

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