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sodium metasilicate

[met-uh-sil-i-kit, -keyt]
noun Chemistry.
  1. a white, granular sodium silicate, Na2SiO3, soluble in water: used in detergents and in bleaching and cleaning products.
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Origin of sodium metasilicate

First recorded in 1925–30; meta- + silicate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018