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Synset

fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
<noun.substance>   freq. cnt.: 5 freq. cnt.: 5

coal more info
lexical pointers
derivationally related form
coal coal coal
semantic pointers
substance meronym
carbon, C, atomic number 6
hypernym
fossil fuel vegetable matter
hyponym
anthracite, anthracite coal, hard coal bituminous coal, soft coal lignite, brown coal, wood coal steam coal