D defs.my
Entry 1 sense Webster, 1913

metrication

/(mĕt`rĭ*kā"shŭn)/ · met·ri·ca·tion · IPA
01 n. The act or process of converting the standard system of units of a country to those of the metric system; metrification; as, Great Britain …
  1. 1.
    The act or process of converting the standard system of units of a country to those of the metric system; metrification; as, Great Britain has completed its metrification, but the United States still resists complete change. See: metric system