price-index

price index

noun
an index of the changes in the prices of goods and services, based on the prices of the same goods and services at a period arbitrarily selected as a base, usually expressed as 100.

Origin:
1885–90

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
price index

noun
an index that traces the relative changes in the price of an individual good (or a market basket of goods) over time 
WordNet® 3.0, © 2006 by Princeton University.
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