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1. Dictionary

   index number

   noun

   • 1. a number showing the variation in a price or value compared with the price or value at a specified earlier time (often represented by the number 100): "the official index numbers of agricultural production show declining production"
   • ▪ a number giving the magnitude of a physical property or other measured phenomenon in terms of a standard: "foods are assigned an index number from 1 to 100 (100 being pure glucose)"

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