 |
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| culm; stone coal | |||
| hard coal | |||
| charcoal; charcoal black; charcoal gray | |||
| black coal; black coal A natural black graphitelike material used as a fuel, formed from fossilized plants and consisting of amorphous carbon with various organic and some inorganic compounds | |||
| stove coal; hard coal stonecoal; lean coal | |||
| anthracite | |||
| |||
| anthracitic coals | |||
| anthracite: 24 phrases in 9 subjects |
| Chemistry | 4 |
| Coal | 1 |
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