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| rock Any aggregate of minerals that makes up part of the earth's crust. It may be unconsolidated, such as sand, clay, or mud, or consolidated, such as granite, limestone, or coal | |||
| صخر: 20 phrases in 4 subjects |
| Agriculture | 5 |
| Geology | 2 |
| Oil / petroleum | 2 |
| Soil science | 11 |