Flint, silica.
| 单词 | θ6999 |
| 释义 | the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > silica (6) silexa1592 Flint, silica. silica1801 An important mineral substance (the dioxide of silicon), which in the form of quartz enters into the composition of many rocks, and is contained in… Subcategories:— varieties (4) |
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