silica
English Thesaurus
1. a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite (noun.substance)
| hypernym | : | oxide, |
| definition | : | any compound of oxygen with another element or a radical (noun.substance) |
| hyponym | : | chert, |
| definition | : | variety of silica containing microcrystalline quartz (noun.substance) |
| hyponym | : | flint, |
| definition | : | a hard kind of stone; a form of silica more opaque than chalcedony (noun.substance) |
| hyponym | : | silex, |
| definition | : | a pure form of finely ground silica (noun.substance) |
| substance meronym | : | cristobalite, |
| definition | : | a white mineral consisting of silica; found in volcanic rocks (noun.substance) |
| substance meronym | : | quartz, |
| definition | : | a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities (noun.substance) |
| substance meronym | : | tridymite, |
| definition | : | a mineral form of silica (noun.substance) |
| derivation | : | siliceous, silicious, |
| definition | : | relating to or containing or resembling silica (adj.pert) |
| derivation | : | siliceous, silicious, |
| definition | : | relating to or containing or resembling silica (adj.pert) |
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