one quadrillionth

/wʌn kwɑˈdrɪljənθ/
adjective
  1. Being one of a quadrillion equal parts; extremely tiny in amount or degree.
    • The detector is sensitive enough to find one-quadrillionth concentrations of pollutants.
    • A one-quadrillionth error in the measurement would be negligible.
    • They calculated the one-quadrillionth portion of the national budget.
noun
  1. One of a quadrillion equal parts of something; the fraction 1/1,000,000,000,000,000.
    • Scientists measured the contamination at one-quadrillionth of the total volume.
    • A one-quadrillionth of a second is called a femtosecond.
    • The sample contained only a one-quadrillionth of a gram of the rare element.
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