wood coal

Noun
  1. Intermediate between peat and bituminous coal (synset 114839433)
    is a type of:
    • coal - fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
    • humate - material that is high in humic acids
    subtypes: jet - a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation
    same as: brown coal, lignite
  2. A carbonaceous material obtained by heating wood or other organic matter in the absence of air (synset 114709457)
    is a type of:
    • atomic number 6, c, carbon - an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
    • fuel - a substance that can be consumed to produce energy
    same as: charcoal

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