rock oil

Noun
  1. A dark oil consisting mainly of hydrocarbons (synset 115005138)
    is a type of:
    • fossil fuel - fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
    • oil - a slippery or viscous liquid or liquefiable substance not miscible with water
    subtypes: resid, residual oil - oil products that remain after petroleum has been distilled
    substance holonym: 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
    same as: crude, crude oil, fossil oil, oil, petroleum

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