a quantity whose variation over a period of time measures the change in some phenomenon.
(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
- Index of industrial production
noun 1. (in Britain) an index produced by the Central Statistical Office showing changes in the production of the primary British industries
noun, Optics. 1. a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction) or the ratio of the speed of light in a specified medium to that in the given medium (relative […]
noun, Machinery. 1. a plate perforated with rows of different numbers of equally spaced holes as a guide for indexing work.
- Index register
processor A register found in some CPUs, whose contents can be added to the address operand to give the effective address. Incrementing the index register then allows the program to access the next location in memory and so on, making it very useful for working with arrays or blocks of memory. Index registers first appeared […]