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definitions

index number

noun Statistics.

a quantity whose variation over a period of time measures the change in some phenomenon.

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Nearby words

index fossil, index fund, index futures, index librorum prohibitorum, index mineral, index number, index of industrial production, index of refraction, index plate, index set, index, cephalic

Origin of index number

First recorded in 1870–75
Also called index.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for index number

index number

noun

statistics a statistic indicating the relative change occurring in each successive period of time in the price, volume, or value of a commodity or in a general economic variable, such as the price level, national income, or gross output, with reference to a previous base period conventionally given the number 100
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012