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Silicon Valley

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noun
  1. the area in northern California, southwest of San Francisco in the Santa Clara valley region, where many of the high-technology design and manufacturing companies in the semiconductor industry are concentrated.
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Origin of Silicon Valley

so called from the silicon wafers employed in semiconductor devices
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for silicon valley

Silicon Valley

noun
  1. an industrial strip in W California, extending S of San Francisco, in which the US information technology industry is concentrated
  2. any area in which industries associated with information technology are concentrated
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
silicon valley in Culture

Silicon Valley

A region on the San Francisco Peninsula in California where the miniaturized electronics industry is centered, so called because most of the devices built there are made of semiconductors such as silicon.

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Note

The term is often used as a catchword to describe the development of high-tech industry (see also high-tech): “If we can attract this corporation to our town, we could become another Silicon Valley.”
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.