billionth

Noun
  1. domain region: america, the states, u.s., u.s.a., united states, united states of america, us, usa - North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
    is a type of: rank - relative status
  2. is a type of: common fraction, simple fraction - the quotient of two integers
    same as: one-billionth
Adjective
  1. similar to: ordinal - being or denoting a numerical order in a series

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