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| lignite Coal of relatively recent origin consisting of accumulated layers of partially decomposed vegetation, intermediate between peat and bituminous coal; often contains patterns from the wood from which it formed | |||
| wood coal | |||
| lignite | |||
| brown coal | |||
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lignito : 57 a las frases, 13 temas |
| Ambiente | 5 |
| Carbón | 20 |
| Ciencias de la vida | 2 |
| Electrónica | 1 |
| Estadísticas | 3 |
| General | 1 |
| Geología | 1 |
| Industria | 2 |
| Industria energetica | 10 |
| Ingeniería mecánica | 1 |
| Perforación | 4 |
| Petróleo | 2 |
| Química | 5 |