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-link

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