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  1. Oxford Dictionary

    billionth

    • IPA[ˈbɪljənθ]

    英式

    • ordi
      constituting number one billion in a sequence; 1,000,000,000th；constituting an unspecified but very large number in a sequence

    • noun: billionth, plural noun: billionths

    • 釋義

    ordi

    • 1. constituting number one billion in a sequence; 1,000,000,000th the birth of India's billionth citizen
    • ▪ informal constituting an unspecified but very large number in a sequence I was late again for the billionth time
    • 2. each of one billion equal parts into which something is or may be divided particles so small they're measured in billionths of a metre