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sliding scale

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noun [countable] sliding scale pronunciation in British English /ˌslaɪdɪŋ ˈskeɪl/ 
Word Forms
singularsliding scale
pluralsliding scales
  1. a system of making payments or paying taxes where the amount that you pay changes according to a fixed set of rates

    The doctor has a sliding scale of fees based on patients' income.


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