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| acidic |
containing a high proportion of acid-forming silica, as rocks or soil. [1/3 definitions] |
| buhrstone |
a type of rock with much silica, used for grinding; millstone. |
| burr3 |
a variety of limestone containing silica, or a millstone made of it; buhrstone. |
| diatom |
any of various tiny single-celled algae having cell walls of silica. |
| glass |
a hard, breakable, usu. transparent material made from silica and metallic oxides and used for windows, bottles, mirrors, and the like. [1/5 definitions] |
| granite |
a coarse-grained igneous rock usu. composed of silica-rich minerals such as quartz, feldspar, and small amounts of mica or amphibole, commonly used for building, sculpture, and the like. [1/2 definitions] |
| ironstone |
any of several iron ores containing impurities of silica and clay. [1/2 definitions] |
| isinglass |
a mineral compound containing silica that can be separated into thin, often transparent layers; mica. [1/2 definitions] |
| opal |
a variously colored, often iridescent, hydrated form of silica often used as a semiprecious stone. |
| radiolarian |
any small marine protozoan having an amoebalike body encased in a silica skeleton. |
| rhyolite |
a fine-grained, volcanic rock that is similar to granite in composition and has a high silica content. |
| silex |
silica, as found in flint or quartz. |
| silica gel |
a highly absorbent form of silica, used mainly as a drying agent. |
| siliceous |
of, containing, or like silica. [2 definitions] |
| silicic |
relating to, containing, or obtained from silicon or silica. |
| silicon |
a chemical element that has fourteen protons in each nucleus, that is found naturally only in compounds such as silica, that composes one fourth of the earth's crust, and that is used in many industrial applications. (symbol: Si) |
| silicosis |
a disabling lung disease caused by prolonged inhalation of silica dust. |
| stoneware |
a hard pottery made with clay having a large proportion of silica or flint. |
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