English edit

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

Etymology edit

milliard +‎ -th

Adjective edit

milliardth (not comparable)

  1. (now rare) The ordinal form of the number one milliard.

Noun edit

milliardth (plural milliardths)

  1. (now rare) The person or thing in the milliardth position.
  2. (now rare) One of a milliard equal parts of a whole.