billionth

English

**English numbers ^(edit)**
← 1,000,000 (10⁶)	← 100,000,000 (10⁸)	1,000,000,000 (10⁹)	10¹² → ^{[a], [b]}	10¹⁵ → ^{[a], [b]}
Cardinal: billion, milliard, thousand million Ordinal: billionth, milliardth Multiplier: billionfold, milliardfold Metric collective prefix: giga- Metric fractional prefix: nano- Number of years: giga-annum, gigayear

**English numbers ^(edit)**
← 1,000,000 (10⁶)	^{[a], [b]} ← 1,000,000,000 (10⁹)	10¹²	10¹⁵ → ^{[a], [b]}	10¹⁸ → ^{[a], [b]}
Cardinal: trillion, billion Ordinal: trillionth, billionth Multiplier: trillionfold, billionfold Metric collective prefix: tera- Metric fractional prefix: pico-

billion +‎ -th

billionth (not comparable)

billionth (plural billionths)

The person or thing in the billionth position.
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.

billionth