- noun an element with semiconductor properties, used in crystal form as a base for the manufacture of integrated circuits
- A nonmetallic chemical element whose atomic number is 14, and which has two allotropic forms. One form is a brown powder, and the other consists of dark gray crystals with a bluish tinge. Silicon is very common in nature, comprising about 25% of the earth's crust by weight, and is usually found in the form of silicon dioxide. It has over 15 known isotopes, of which 3 are stable. It is used extensively in semiconductors such as transistors, diodes, rectifiers, and photocells, as an alloying agent, and in optics. Its chemical symbol is Si.
- chemical symbol Si
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