Definition of international system of units International system of units
We found 3 definitions of international system of units from 3 different sources.
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What does international system of units mean?
WordNet
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| international system of units - a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the United States is the only country in the world not totally committed to the Systeme International d'Unites" | ||
| Systeme International d'Unites, Systeme International, SI system, SI, SI unit, International System of Units, International System | ||
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OmegaWiki DictionaryOmegaWiki Dictionary Ω
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international system of units
A complete system of standardized units and prefixes for fundamental quantities of length, time, volume, mass, and so on.
Wikipedia 
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The International System of Units is the international standard form of the metric system today. SI is the short name for this from the French language phrase "Système International d'unités".
The metric system is a system of measuring based on the metre for length, distance or displacement, kilogram for mass, and second for time.
The metre, kilogram and second can be used in combination with each other. This will make different units of measurement to mean other amounts, such as volume, energy, pressure, and velocity.
Sometimes we want to talk about larger or smaller measurements. Then we add a prefix. A prefix is something to the beginning of a word to make a word. The prefix "kilo-" means "1000" and the prefix "milli-" means "0.001". So one "kilometre" is 1000 metres and one "milligram" is a 1000th of a gram. These prefixes are shown in the table on the right side.
History and use.
These were created in France after the French Revolution.
They are now used almost everywhere in the world, apart from the United States, Liberia and Myanmar, where the older imperial units are still widely employed. Varios other countries, most of them historically related to the British Empire, are in different stages of the process of introduction of the metric system as replacement for or as an addition to the use of the imperial system.
Even the United Kingdom, which created the old US units of measurement, is now generally using the metric system alongside the imperial system. There is eve
