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WordReference Random House Unabridged Dictionary of American English © 2024sil•i•cate (sil′i kit, -kāt′),USA pronunciation n. - Mineralogyany of the largest group of mineral compounds, as quartz, beryl, garnet, feldspar, mica, and various kinds of clay, consisting of SiO2 or SiO4 groupings and one or more metallic ions, with some forms containing hydrogen. Silicates constitute well over 90 percent of the rock-forming minerals of the earth's crust.
- Chemistryany salt derived from the silicic acids or from silica.
- 1805–15; silic(a) + -ate2
Collins Concise English Dictionary © HarperCollins Publishers:: silicate /ˈsɪlɪkɪt -ˌkeɪt/ n - a salt or ester of silicic acid, esp one of a large number of usually insoluble salts with polymeric negative ions having a structure formed of tetrahedrons of SiO4 groups linked in rings, chains, sheets, or three dimensional frameworks. Silicates constitute a large proportion of the earth's minerals and are present in cement and glass
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