oligoclase
English Thesaurus
1. any of a series of triclinic feldspars that form rocks (noun.substance)
| hypernym | : | feldspar, felspar, |
| definition | : | any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium (noun.substance) |
| hyponym | : | albite, white feldspar, |
| definition | : | a widely distributed feldspar that forms rocks (noun.substance) |
| hyponym | : | anorthite, |
| definition | : | rare plagioclastic feldspar occurring in many igneous rocks (noun.substance) |
| substance meronym | : | dacite, |
| definition | : | a grey volcanic rock containing plagioclase and quartz and other crystalline minerals (noun.substance) |
| substance meronym | : | basalt, |
| definition | : | the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene (noun.substance) |
| derivation | : | plagioclastic, |
| definition | : | of or relating to plagioclase (adj.pert) |
| derivation | : | plagioclastic, |
| definition | : | of or relating to plagioclase (adj.pert) |
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