Si
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Si,
river, China: see XiXior Xi Jiang
, great river of S China, c.1,250 mi (2,010 km) long, rising in E Yunnan prov. and flowing generally E through Guangxi and Guangdong provs. to the South China Sea near Guangzhou; the Kui, Bei, and Dong rivers are its chief tributaries.
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Si,
symbol for the element siliconsilicon,nonmetallic chemical element; symbol Si; at. no. 14; interval in which at. wt. ranges 28.084–28.086; m.p. 1,410°C;; b.p. 2,355°C;; sp. gr. 2.33 at 25°C;; valence usually +4.
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SI:
see International System of UnitsInternational System of Units,officially called the Système International d'Unités, or SI, system of units adopted by the 11th General Conference on Weights and Measures (1960). It is based on the metric system.
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Si
(chemistry)
SI
(physics)
International System of Units (SI)
A system of units based on the following fundamental quantities: metre, kilogram, second, ampere, kelvin, candela, and mole.
SI
The symbol for the International System of Units.
Xi
, Hsi, Si a river in S China, rising in Y?nnan province and flowing east to the Canton delta on the South China Sea: the main river system of S China. Length: about 1900 km (1200 miles)
SI
(unit)Syst?me International.
SI
(character)si
(networking)The country code for Slovenia.