quartz
English Thesaurus
1. 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)
| hypernym | : | mineral, |
| definition | : | solid homogeneous inorganic substances occurring in nature having a definite chemical composition (noun.substance) |
| hyponym | : | quartz crystal, |
| definition | : | a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators (noun.artifact) |
| hyponym | : | amethyst, |
| definition | : | a transparent purple variety of quartz; used as a gemstone (noun.substance) |
| hyponym | : | calcedony, chalcedony, |
| definition | : | a milky or greyish translucent to transparent quartz (noun.substance) |
| hyponym | : | citrine, |
| definition | : | semiprecious yellow quartz resembling topaz (noun.substance) |
| hyponym | : | rose quartz, |
| definition | : | a translucent rose-red variety of quartz used for ornaments (noun.substance) |
| hyponym | : | aventurine, sunstone, |
| definition | : | a translucent quartz spangled with bits of mica or other minerals (noun.substance) |
| substance holonym | : | atomic number 14, si, silicon, |
| definition | : | a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors (noun.substance) |
| substance holonym | : | silica, silicon dioxide, silicon oxide, |
| definition | : | 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) |
2. colorless glass made of almost pure silica (noun.substance)
| hypernym | : | natural glass, |
| definition | : | magma of any composition that cooled very rapidly (noun.substance) |
| substance holonym | : | silica, silicon dioxide, silicon oxide, |
| definition | : | 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) |
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