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silex

[sahy-leks]
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noun
  1. flint; silica.
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Origin of silex

1585–95; < Latin silex, stem silic- hard stone, flint, boulder
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for silex

silex

noun
  1. a type of heat-resistant glass made from fused quartz
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Word Origin

C16: from Latin: hard stone, flint
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