Metric system Meaning, Definition & Usage

Definitions

1. a system of weights and measures originating in France, the use of which is required by law in many countries, and permitted in many others, including the United States and England. The principal unit is the meter (see Meter). From this are formed the are, the liter, the stere, the gram, etc. These units, and others derived from them, are divided decimally, and larger units are formed from multiples by 10, 100, 1,000, and 10,000. The successive multiplies are designated by the prefixes, deca-, hecto-, kilo-, and myria-; successive parts by deci-, centi-, and milli-. The prefixes mega- and micro- are sometimes used to denote a multiple by one million, and the millionth part, respectively. See the words formed with these prefixes in the Vocabulary. For metric tables, see p. 1682.