From Latin quīndecim (fifteen) +‎ -illion or quin- +‎ decillion.


  • IPA(key): /ˌkwɪndəˈsɪl.i.ən/
    Rhymes: -ɪljən
  • (file)


quindecillion (plural quindecillions)

  1. (rare, US, modern Britain and Australia short scale) 1048.
    • 1946: United States Department of Commerce, The United States Department of Commerce: How it serves you on land and sea and in the air, U. S. Government Printing Office (1946)
      3 quindecillion, 657 quattuordecillion, 262 tredecillion; which is to say the figures 3,657,262 followed by 42 ciphers. Operators of the key punch machines transfer a code symbol from the Census [...].
    • 1978: D. Wallechinsky, I. Wallace, and A. Wallace, The People's Almanac Presents The Book of Lists, Bantam (1978)
      One supernova, in 1054, was thought by many to herald the biblical Day of Judgment. We have reached an energy level of 10 quindecillion ergs, or 1049 ergs.
  2. (rare, dated, Britain and Australia, long scale) 1090.



See alsoEdit