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tektosilicate

American  
[tek-toh-sil-i-kit, -keyt] / ˌtɛk toʊˈsɪl ɪ kɪt, -ˌkeɪt /
Or tectosilicate

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.


Etymology

Origin of tektosilicate

< Greek tēktó ( s ) molten + silicate