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tektosilicate

or tec·to·sil·i·cate

[tek-toh-sil-i-kit, -keyt]
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noun Mineralogy.
  1. any silicate in which each tetrahedral group shares all its oxygen atoms with neighboring groups, the ratio of silicon to oxygen being 1 to 2.
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Origin of tektosilicate

< Greek tēktó(s) molten + silicate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018