si

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The International System of Units, international metric system, metric system of units of measurement used for scientific work

Si, si, or SI may refer to (all SI unless otherwise stated): In language:One of two Italian words:sì (accented) for "yes"si (unaccented), a pronounOne of two Spanish words:sí (accented) for "yes" or the reflexive pronoun.si (unaccented) for "if".şi, a Romanian word for "and"si, a French word meaning "yes, on the contrary", "as," "however," "so" and "if"Si, the person focus-marker in the Chamorro languageSi, a shortening of the first name SimonISO 639 alpha-2 code for the Sinhalese language
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.si is the Internet country code top-level domain (ccTLD) for Slovenia. It is administered by the ARNES, the Academic and Research Network of Slovenia.
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The International System of Units (abbreviated SI from the French ) is the modern form of the metric system. It is the world's most widely used system of units, both in everyday commerce and in science.The older metric system included several groups of units. The SI was developed in 1960 from the old metre-kilogram-second (mks) system, rather than the centimetre-gram-second (cgs) system, which, in turn, had a few variants.The SI introduced several newly named units. The SI is not static — units are created and definitions are modified through international agreement among many nations as the technology of measurement progresses.
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SÍ is an abbreviation for Sørvágs Ítóttarfelag (Sørvágur Sport Association), a sports association in the Faroe Islands. It was founded March 171905.
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Noun
1. 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"
(synonym) Systeme International d'Unites, Systeme International, SI system, International System of Units, International System
(hypernym) metric system

Noun
1. a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
(synonym) silicon, atomic number 14
(hypernym) chemical element, element
(substance-holonym) silicone, silicone polymer

Noun
1. the syllable naming the seventh (subtonic) note of any musical scale in solmization
(synonym) ti, te
(hypernym) solfa syllable

SI, silicon, nonmetallic element, second most common element in the Earth's crust (commonly used to manufacture metal alloys and electronic components) (Chemistry)

initiative system

tourist office or bureau

conj. if, whether

adv. so, such, that, as