| NOUN | substance | oligoclase, plagioclase | any of a series of triclinic feldspars that form rocks |
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| Meaning | Any of a series of triclinic feldspars that form rocks. | |
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| Synonym | plagioclase | |
| Narrower | albite, white feldspar | A widely distributed feldspar that forms rocks |
| anorthite | Rare plagioclastic feldspar occurring in many igneous rocks | |
| Broader | feldspar, felspar | Any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium |
| Substance of | basalt | The commonest type of solidified lava |
| dacite | A grey volcanic rock containing plagioclase and quartz and other crystalline minerals | |
| Spanish | oligoclasa, plagioclasa | |
| Catalan | oligoclasa, oligòclasi, plagioclasa, plagiòclasi | |
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