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si   n  (Music)  a variant of  → te

do-si-do   n

1 a square-dance figure in which dancers pass each other with right shoulders close or touching and circle back to back   sentence substitute

2 a call instructing dancers to perform such a figure, (Also) dos-à-dos   (C20: from dos-à-dos)

Si [¹] , Si Kiang   n  a variant transliteration of the Chinese name for the  → Xi

Si [²]   the chemical symbol for silicon

SI

1   symbol for Système International (d'Unités)  See  → SI unit

2  (N.Z.)   abbrev. for South Island

Si Kiang   n  See  → Xi

Si-ma Qian , Ssu-ma Ch'ien   n ?145--?85 b.c., Chinese historian, author of the Shih-chi, a history of China from earliest times to the 2nd century b.c., usually considered the greatest historical work in Chinese

SI unit   n any of the units adopted for international use under the Système International d'Unités, now employed for all scientific and most technical purposes. There are seven fundamental units: the metre, kilogram, second, ampere, kelvin, candela, and mole; and two supplementary units: the radian and the steradian. All other units are derived by multiplication or division of these units without the use of numerical factors

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Alternative Terms
decimal multiple-mathematics international-system-of-units affix international-bureau-of-weights-and-measures long-and-short-scales si yotta-2 names-of-large-numbers orders-of-magnitude-numbers zetta-2 exa-4 trillion-2 peta-6 tera3 billion-5 giga milliard mega-869 million kilo2 1000-number hecto-6 100-number deca 10 1 deci-2 centi-5 milli-4 micro-7 nano-7 pico-8 femto-4 atto-3302 zepto-2 yocto-2 kilometre-wordnet metre kilogram gram watt-surname national-institute-of-standards-and-technology river-kelvin non-si-unit-prefix litre exponentiation greek-language farad scientific-notation micrometre ngstr-m-3 fermi-unit astronomical-unit light-year-2 parsec international-electrotechnical-commission stress-language year-2000-problem binary-prefix metric-system imperial-unit computing bit byte mb-sec ethernet octet-computing baud symbol-rate hertz decibel kilobyte kibibyte yobi latin numerical-prefix general-conference-on-weights-and-measures are stere engineering-notation number-names list-of-numbers-in-various-languages orders-of-magnitude base-unit free-on-line-dictionary-of-computing gnu-free-documentation-license attoparsec-computer-jargon mcg-2 kibi quantifiers-computer-jargon quadrillion-3 list-of-letters-used-in-mathematics-and-science atto uf prefix

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