metric system international decimal system of weights and measures based on meter for length and the kilogram of mass that was adopted in france in 1795 and now used officially in almost all countries
The metric system is an alternative system of measurement used in most countries, as well as in the United States. The metric system is based on joining one of a series of prefixes, including kilo-, hecto-, deka-, deci-, centi-, and milli-, with a base unit of measurement, such as meter, liter, or gram. (got the answer from google hehe)
