silicon

The word “silicon” means a hard, non-metallic chemical element (symbol Si) that is the basis of computer chips and most rock and sand on Earth. In plain terms, the chemical element that computer chips and most rocks and sand are made from.

“Silicon” is pronounced SIH-lih-kuhn (/ˈsɪlɪkən/ in IPA).

Here is “silicon” used in a sentence: “Silicon chips power almost every modern computer.”

“Silicon” is a noun.

The word “silicon” comes from Latin. Coined by the Scottish chemist Thomas Thomson, adapting an earlier name from Latin silex, "flint," by analogy with "carbon.".

“Silicon” is a fairly common word in modern English.

Silicon is a hard, non-metallic chemical element (symbol Si) that is the basis of computer chips and most rock and sand, while silicone is a man-made, rubbery material built from silicon and oxygen, used in sealants, kitchenware, and medical products. Chips are silicon; flexible bakeware is silicone.

Silicon Valley, the technology region in northern California, is named after silicon, the element used to make computer chips. The name reflects the semiconductor companies that the area's industry was originally built around.

No — silicon is a non-metallic element, usually classified as a metalloid because it shows a mixture of metallic and non-metallic properties. Its ability to conduct electricity under some conditions but not others is exactly why it is the basis of computer chips.

Mostly yes, in combined form: most sand is largely silica, a compound of silicon and oxygen, and silicon underlies most rock and sand on Earth. Pure elemental silicon is rarely found loose in nature and is refined from these minerals for uses such as chip-making.