Metrication

n. application of the metric system; change into the metric system; introduction of the metric system

Metrication (or metrification) refers to the introduction of the SI metric system as the international standard for physical measurements—a long-term series of independent and systematic conversions from the various separate local systems of weights and measures. Metrication began in France in the 1790s and spread during the following two centuries to encompass all, but three, countries with 95% of the world's population.
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Noun
1. the act of changing from imperial units of measurement to metric units: meters, grams, seconds
(synonym) metrification
(hypernym) change
(derivation) metricize, metricise, metrify, metricate

metrication
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CONVERSIONE AL SISTEMA METRICO DECIMALE. DECIMALIZZAZIONE