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Système International [d'Unités] (International System [of Units])
The symbol for silicon.
[Italian, from Medieval Latin; see gamut.]
(Classical Music) music a variant of te
the internet domain name for
(Computer Science) Slovenia
(Placename) a variant transliteration of the Chinese name for the Xi
the chemical symbol for
(Elements & Compounds) silicon
(Units) Système International (d'Unités). See SI unit
(Placename) NZ South Island
International System of Units.
[< French S(ystème) I(nternationale d'Unités)]
Chem. Symbol. silicon.
The symbol for silicon.
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|Noun||1.||Si - 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|
chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
quartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
clay - a very fine-grained soil that is plastic when moist but hard when fired
semiconducting material, semiconductor - a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities
feldspar, felspar - any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
granite - plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
sand - a loose material consisting of grains of rock or coral
|2.||SI - 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"|
International System, International System of Units, SI system, SI unit, Systeme International, Systeme International d'Unites
metric system - a decimal system of weights and measures based on the meter and the kilogram and the second
|3.||si - the syllable naming the seventh (subtonic) note of any musical scale in solmization|
solfa syllable - one of the names for notes of a musical scale in solmization