silicon

[ sil-i-kuhn, -kon ]

Phonetic (Standard)IPA

noun

, Chemistry.

a nonmetallic element, having amorphous and crystalline forms, occurring in a combined state in minerals and rocks and constituting more than one fourth of the earth's crust: used in steelmaking, alloys, etc. : Si; : 28.086; : 14; : 2.4 at 20°C.

silicon

/ ˈsɪlɪkən /

1. a brittle metalloid element that exists in two allotropic forms; occurs principally in sand, quartz, granite, feldspar, and clay. It is usually a grey crystalline solid but is also found as a brown amorphous powder. It is used in transistors, rectifiers, solar cells, and alloys. Its compounds are widely used in glass manufacture, the building industry, and in the form of silicones. Symbol: Si; atomic no: 14; atomic wt: 28.0855; valency: 4; relative density: 2.33; melting pt: 1414°C; boiling pt: 3267°C
2. modifier; sometimes capital denoting an area of a country that contains a density of high-technology industry

silicon

/ sĭl′ĭ-kŏn′ /

A metalloid element that occurs in both gray crystalline and brown noncrystalline forms. It is the second most abundant element in the Earth's crust and can be found only in silica and silicates. Silicon is used in glass, semiconductors, concrete, and ceramics. Atomic number 14; atomic weight 28.086; melting point 1,410°C; boiling point 2,355°C; specific gravity 2.33; valence 4.
See Periodic Table

silicon

A chemical element from which semiconductors are made. It is also used in the manufacture of glass, concrete, brick, and pottery.

Origin of silicon¹

1817; silic(a) + -on, as in carbon and boron

Origin of silicon¹

C19: from silica , on the model of boron, carbon

A brilliant Silicon Valley entrepreneur may have found a way to get dark money out of politics without changing any laws.

Greer is a young, entrepreneurial, poker-loving Texan who ended up in Silicon Valley.

In Silicon Valley proper, that number increases to $108,603, marking a 7.2 percent year-over-year increase.

Normally Democratic Silicon Valley opened up its wallets to the Republicans this time out.

South of Silicon Valley, an entire town is being deformed, slowly, by plate tectonics.

You do the same with an ordinary piece of silicon for comparison and then seal both tubes with an oxygen-gas torch.

You break the quartz tubes one at a time and attach each of the two pieces of silicon to a card with self-sticking tape.

He was still wearing the blue blazer and khakis he wore on the days that he was consulting in Silicon Valley.

Silicon steel and manganese steel are sometimes classed as alloy steels.

These powders may contain borax or salt, and to prevent a hard, brittle weld, graphite or ferro-silicon may be added.

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