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Definitions of billionth
  1. noun
    one part in a billion equal parts

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  2. noun
    position 1,000,000,000 in a countable series of things
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  3. adjective
    the ordinal number of one billion in counting order

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Definition that contains billionth
  • a a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  • ng one billionth (1/1,000,000,000) gram
  • angstrom a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  • nanosecond one billionth (10^-9) of a second; one thousandth of a microsecond
  • nanometre a metric unit of length equal to one billionth of a meter
  • nm a metric unit of length equal to one billionth of a meter
  • micromillimeter a metric unit of length equal to one billionth of a meter
  • angstrom unit a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  • abohm a unit of resistance equal to a billionth of an ohm
  • nanovolt a unit of potential equal to one billionth of a volt
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