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# metric system

[ me-trik- sis-tuhm ]

/ ˈmɛ trɪk ˌsɪs təm /

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noun

a decimal system of weights and measures, based on the meter (39.37 inches) for length and the gram (15.432 grains) for mass or weight, first adopted in France in the 17th century, now universally used in science, and officially used for all purposes in most countries. Derived units are the liter (0.908 U.S. dry quart, or 1.0567 U.S. liquid quart) for capacity, being the volume of 1,000 grams of water under specified conditions; the are (119.6 square yards) for area, being the area of a square 10 meters on a side; and the stere (35.315 cubic feet) for volume, being the volume of a cube 1 meter on a side, the term “stere,” however, usually being used only in measuring firewood. Names for units larger and smaller than these are formed from the above names by the use of the following prefixes: kilo-, 1,000; hecto-, 100; deka-, 10; deci-, 0.1; centi-, 0.01; milli-, 0.001. To these are often added: tera-, one trillion; giga-, one billion; mega-, one million. With the addition of basic physical units it is now officially known by the French name Le Système International d'Unités (abbreviation SI ) or in English as the International System of Units.

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## Origin of metric system

First recorded in 1860–65

## Words nearby metric system

metricize, metric madness, metric martyr, metrics, metric space, metric system, metric ton, metric topology, metridium, metrification, metrifonate

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use metric system in a sentence

## British Dictionary definitions for metric system

metric system

noun

any decimal system of units based on the metre. For scientific purposes the Système International d'Unités (SI units) is used

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for metric system

metric system

A decimal system of weights and measures based on the meter as a unit of length, the kilogram as a unit of mass, and the liter as a unit of volume. Compare US Customary System. See Table at measurement.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Cultural definitions for metric system

metric system

A system of measurement in which the basic units are the meter, the second, and the kilogram. In this system, the ratios between units of measurement are multiples of ten. For example, a kilogram is a thousand grams, and a centimeter is one-hundredth of a meter. Virtually all countries of the world, except the United States, use the metric system. Among scientists, the metric system is called SI — an abbreviation for Système internationale, which is French for “International System.”

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.