billionth

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English

English numbers (edit)
 ←  1,000,000 (106) ,  ←  100,000,000 (108) 1,000,000,000 (109) 1012  → , 1015  → ,
    Cardinal: billion, milliard, thousand million
    Ordinal: billionth, milliardth, thousand-millionth
    Multiplier: billionfold, milliardfold, thousand-millionfold
    Metric collective prefix: giga-
    Metric fractional prefix: nano-
    Number of years: giga-annum, gigayear
English numbers (edit)
 ←  1,000,000 (106) , ,  ←  1,000,000,000 (109) 1012 1015  → , 1018  → ,
    Cardinal: trillion, billion
    Ordinal: trillionth, billionth
    Multiplier: trillionfold, billionfold
    Metric collective prefix: tera-
    Metric fractional prefix: pico-

Etymology

From billion +‎ -th.

Pronunciation

Adjective

billionth (not comparable)

  1. The ordinal form of the number one billion.

Noun

billionth (plural billionths)

  1. The person or thing in the billionth position.
  2. One of a billion equal parts of a whole.
    • 2020 April 19, Robin McKie, “Coronavirus: five months on, what scientists know about Covid-19”, in The Guardian:
      That is an extraordinary achievement for a spiky ball of genetic material coated in fatty chemicals called lipids, and which measures 80 billionths of a metre in diameter. Humanity has been brought low by a very humble assailant.

Translations