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Back-formation from million, billion, trillion, quadrillion, each from French.



  1. Combined with Latin prefixes for names of integers in order to form names of powers of a million or of a thousand greater than 1,000,000. Thus we have the names billion, trillion, etc.
  2. Added to various nonsense syllables to indicate an arbitrarily very large number.

Usage notes[edit]

  • The words formed by combining the Latin prefix for the name of an integer n (n > 1) with this suffix may mean 1,000,000^n or 1000^{n + 1} depending on national practices. Hence billion can mean “million million” or “thousand million”. See the usage notes at Wiktionary’s appendix on numbers for more information.

Derived terms[edit]

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